BEST 6042 B - Associated Equipment Corp.
Contents
1. Curved carbon discs allow better low end resolution of current and longer life m AMPS ZERO ADJUST allows for maximum accuracy in AMPS reading m LOAD ON light indicates the carbon pile is actuated and serves as a reminder to turn the load off full counter clockwise position m AMPS meter reads both and amps for easy diagnosis of leakage current problems m DEFECTIVE DIODE indicator light lets you know when alternator output diodes or GM diode trios have failed m The electronic circuits are protected by a fuse against excessive voltage inputs that will damage the unit LED indicators on the circuit board allow for easy diagnosis of fuse or other problems m The electronic circuits are protected against reverse voltages caused by connecting leads incorrectly m The electronic circuit board has a protective coating to prevent damage and meter inaccuracy due to moisture and dirt AMP ADJUST VOLTS AMPS SAFETY INSTRUCTION 0 Q LOAD ADJUST FIELD VOLTS 6042 EIASSOCIATED The FIELD selector switch is spring loaded and always returns to an off position so there is no power on the field lead when not in use The field wire blue is supplied to allow for regulator trouble shooting The lead may be switched to negative A or positive B polarity depending on the application The lead has a circuit breaker in it to prevent da2. battery 2 NEVER smoke or allow a spark or flame in the vicinity of battery or engine 3 Be extra cautious to reduce risk of dropping a metal tool onto a battery The tool may spark or short circuit the battery or other electrical parts which may cause an explosion 4 Remove personal metal items such as rings bracelets necklaces and watches when working with a lead acid battery A lead acid battery can produce a short circuit current high enough to instantly weld a ring or the like to metal and cause severe burn 5 Spilled acid Neutralize with a solution of baking soda 1 pound per gallon of cold water or household ammonia 1 pint per gallon of cold water VEHICLE SAFETY 1 Keep your body clothing and test leads away from all moving parts of the vehicle Remember electric fans may start at any time 2 Avoid hot engine parts 3 Engine exhaust contains deadly carbon monoxide gas Run engine only in a well ventilated area with exhaust gases ventilated outdoors 4 When running engine tests be sure that the vehicle is in park or neutral and the parking brake is on when starting the vehicle Block wheels to prevent vehicle movement 5 When disabling the ignition system to run starter tests always refer to vehicle service manual for proper procedure 6 Do not connect any test lead to carburetor fuel lines or sheet metal parts of frame TESTER PRECAUTIONS AND NOTES 1 Always be sure LOAD ADJUST knob is in fu
3. lower tray 1 fasten the back leg to lower tray with 2 each bolts 4 washers 5 and nuts 6 Align the middle holes in back leg with holes in upper tray and fasten with 2 each bolts 4 washers 5 and nuts 6 Note At this time only finger tighten the bolts and nuts so the frame can be easily adjusted to square later 2 Place front leg 7 onto lower and upper trays aligning the holes in all three parts Attach the front leg to both trays with bolts 4 washers 5 and nuts 6 Flip the cart over 180 and repeat steps 1 and 2 for the right side legs See Figure 1 Figure 1 3 Attach the top plate 8 and handle 9 with 4 each of 10x1 screws 10 and 10 nuts 11 See Figure 2 Figure 2 4 Attach the B E S T control unit 12 to the top plate 8 Place the feet 13 between top plate and control unit Flat side of foot is placed against top plate Insert the 10x1 1 screws 14 through top plate and feet and thread into the threaded fasteners in the four corners of the control unit base See Figure 3 Figure 3 5 Figure 4 Tap one axle nut 15 onto one end of the axle 16 with a rubber mallet Slide one wheel 17 onto the axle Push the axle through the holes located on the bottom of the back legs Slide the second wheel onto the axle Tap the second axle nut onto the axle Press the feet inserts 18 into the bottom of the front legs Make sure the frame is square before tightening all
4. may not provide the proper charge to start the vehicle Overcharging will cause excess water usage in the battery and shorten battery life Proper charging voltage and current from the charging system to the battery is important for the longest life and maximum performance The proper end of charge voltage will depend on the type of battery installed by the manufacturer and ambient temperature of the charging system e A conventional battery lead antimony will require charging voltages up to about 14 5 volts e A recombination battery or low maintenance battery will require charging voltages up to about 15 0 volts e A maintenance free battery will require charging voltages up to about 15 5 volts Voltage specifications will vary from manufacturer to manufacturer The service manual for the vehicle should be consulted for exact charging specifications ACCESSORIES FIGURE 9 It is also important that the charging system be capable of putting out it s rated current If the electrical load lights blower power accessories etc in the vehicle is more than the output of the alternator the battery will discharge to provide the needed current The battery may become discharged and will not recharge until some of the load is turned off This type of discharge charge cycle will greatly shorten the life of the battery Therefore output current as well as output voltage of the charging system should be checked NOTE A check o
5. 9 Negative when referring to a battery terminal will mean the one marked Neg N and 10 PLEASE NOTE THAT THE DEFECTIVE DIODE LIGHT MAY FLASH ON AND OFF DURING SOME OF THE TESTS DESCRIBED THIS IS NORMAL AND SHOULD NOT BE CONSTRUED TO BE A PROBLEM WITH THE UNIT 11 During a load test the light gauge leads may be used to read voltage across Battery 1 cable jumper and Battery 2 These can be added up to give the total system voltage This total may not be the same as read by the voltmeter on INT position with the clamps installed as shown This may be caused by corrosion on terminals rounding off by the voltmeter circuit or other factors and does not mean there is a problem with the unit 6V BATTERY 1 BATTERY 2 FIGURE 1 The components in the AMPS PICKUP are somewhat temperature sensitive As it warms near a hot engine or cools when exposed to outdoor air the zero on the AMPS meter may drift Once the pickup has stabilized the zero will not drift BATTERY LOAD TESTS TESTING 12 VOLT BATTERIES 4 Read the open circuit voltage OCV of the battery If the voltage is 14 4 volts of higher the load test may be run If 12 3 1 The standard battery load test is to apply a load on the battery equal to 4 the cold cranking amp CCA capacity of the battery volts or lower 75 state of charge the battery should be recharged and retested for 15 seconds Both the voltage and temperature of the gt ba
6. BEST 6042 ASSOCIATED BATTERY ELECTRICAL SYSTEMS TESTER OPERATOR AND SAFETY MANUAL The B E S T tester is designed to test electrical systems on 12 12 24 and 24 volt vehicles It can test and evaluate starters batteries alternators regulators wiring connections and other electrical equipment in the low voltage circuits in the vehicle Before operating this unit thoroughly familiarize yourself with the safety instructions included in this booklet and in the service manual TABLE OF CONTENTS FCatureS cccsscesient cates cobs ees beid ek tian eee alt ae 1 Safety instructions ececeeeceeeeeeeeeeeeeeseeeeeeeaeeeeneeeees 2 Battery Load TeSts o oo eeceeeeeeeeeeneeeeeeeeaeeeeeenaeeeeeeaas 3 Starter Tests xt erechevesedeteie ae tecests feateeswss tale tintderviactent 5 Charging System Tests ccccesseeeseeeseeeeseeeeeeeeeees 5 Trouble Shooting Hints cecceseeeeeeeeseeeeeeseeeeeees 7 Assembly Instructions 0 ccccccceeeineeeieeeetieeeeees 8 FEATURES OF THE B E S T INCLUDE m Large easy to read LED digital AMPS and VOLTS meters The VOLTS meter reads voltages to 99 9 volts DC on the EXT position and up to 35 0 volts DC on the INT position The AMPS meter reads DC currents up to 999 amps m The input impedance of the meters is 10 Meg ohms for accurate testing of solid state circuits m The carbon pile is rated 500 amps on 12 volt batteries for load testing batteries up to 1000 CCA capacity
7. GM alternator and must be checked whenever alternator problems are suspected These diodes are separate from the output rectifier of the alternator They are used as part of a feedback loop to the internal regulator 1 Attach the heavy gauge leads to the battery 2 VOLTS switch should be in EXT position 3 Attach the black light gauge lead to the negative battery post or frame of alternator 4 Attach the red light gauge to the number 1 terminal of the plug in the alternator DO NOT DISCONNECT THE PLUG FROM THE ALTERNATOR DAMAGE MAY RESULT IF THE PLUG IS DISCONNECTED 5 Start the engine and let run at normal idle Do not apply any load to the battery 6 If the DEFECTIVE DIODE light comes on and stays on it indicates a defective diode trio The alternator should be repaired or replaced ALTERNATOR OUTPUT TEST Bypassing the regulator If the alternator did not pass the first output test that was run this test should be performed to determine whether the alternator or regulator is at fault Determine from the vehicle service manual whether the regulator is type A or 1 Connect the unit to the vehicle as shown See figure 11 ALTERNATOR 2 Disconnect the lead wire from the field terminal of the alternator or regulator 3 Attach the blue test lead to the field terminal of the alternator or if disconnected at the regulator the wire that leads from the regulator to the field terminal IF THE LEAD FROM THE REGULATOR IS NO
8. T DISCONNECTED AT ONE END OR THE OTHER DAMAGE MAY OCCUR TO THE UNIT WHEN TESTING 4 Start the engine and adjust engine speed to about 2000 RPM 5 Apply a load to the battery to reduce the system voltage by about 2 volts 6 Hold the spring loaded FIELD selector switch in the proper position In the A position the field lead is connected to the negative terminal In the B position the field lead is connected to the positive terminal This is called full fielding the alternator Pushing the switch into the wrong position will not damage the alternator FIELD WIRE B FROM ALTERNATOR TO REGULATOR It should be within 10 of the manufacturer s specification to be acceptable If a number of accessories have been added to the vehicle the alternator output should be high enough to supply the total accessory load OUTPUT DIODE STATOR TEST 1 Attach the tester as shown in the above diagram Attach the light gauge positive lead to the positive output terminal of the alternator Attach the light gauge negative lead to the frame ground of the alternator VOLTS switch should be on EXT position 2 Start vehicle and run at a fast idle Apply a load to the battery as described in the OUTPUT CURRENT TEST 3 Defective output diodes or a stator problem will turn the DEFECTIVE DIODE light on in 1 2 seconds and it will glow steadily If the light blinks on and then stays off there are no defective parts 4 If the positive
9. attery voltage you As will have no indication of the potential problem If the good AA E voltagsJor aB volt battery battery voltage is not high enough to offset the bad battery voltage the group may test bad and both batteries replaced when only one of the needs to be BATTERY TEMPERATURE COMPENSATION 15 SECOND LOAD TEST B1 VOLTAGE B2 VOLTAGE m Ee Sie 6V 6V BATTERY 1 BATTERY 2 Please note that the test described above is not the easiest FIGURE 6 way to run a test on two batteries in series but it is the most accurate If you were to test the batteries and take only one voltage reading from the positive terminal of Battery 1 to the negative terminal of Battery 2 there are problems that could remain hidden or cause excessive replacement costs TESTING 24 VOLT SYSTEMS 24 volt batteries may be tested by the same procedure as described for 12 volt batteries The minimum acceptable voltages will be twice what is listed for 12 volt batteries m LOAD TESTS ON 24 VOLT BATTERIES SHOULD BE LIMITED TO 300 AMPS FOR 15 SECONDS Higher currents or longer times may shorten carbon pile life FIGURE 7 STARTER TESTS Current draw of the starter battery voltage and voltage drop of leads can be measured when connected as shown See figure 8 STARTER Before running any starter tests disable the engine FRAME by removing the coil wire from the distributor or by K disco
10. bolts and nut to a snug fit DO NOT OVER TIGHTEN over tightening can deform the legs Place the top plate control unit assembly on the assembled cart Fasten the top plate to the back legs with 2 each bolts 4 washers 5 and nuts 6 Attach the top plate to the front legs The top plate has two pairs of holes so the viewing angle can be adjusted Bolting through the top pair of holes will mount the top plate in a flat position The lower pair of holes will elevate the plate at a 15 viewing angle See Figure 4 ASSOCIATED EQUIPMENT CORPORATION 5043 Farlin Avenue Saint Louis Missouri 63115 Tel 314 385 5178 Fax 314 385 3254 www associatedequip com 24041 027 0278 Rev 20100204
11. f the charging system should include a check of the battery cables to ground and to the alternator to determine bad connections OUTPUT VOLTAGE TEST 1 Connect tester to battery as shown Connect AMPS PICKUP around positive output cable of alternator If wires split off to feed power to accessories the pickup must be placed over the wires between the point the split and the alternator Do not place the pickup closer than 6 inches to the alternator or the current readings may be affected by the magnetic field of the alternator 2 VOLTS switch should be in INT position Make sure all accessories are off in the vehicle Start vehicle and allow the engine to run at fast idle until the current output from the alternator is between 0 10 amps Read the output voltage Proper output voltages should be as listed previously REMEMBER Charging systems in a vehicle will compensate for ambient temperatures by increasing the charging voltage at low temperatures Check the vehicle service manual for proper charging voltages at low temperatures BO OUTPUT CURRENT TEST Connect the tester as above and run the vehicle at fast idle Apply a load to the battery to obtain the highest reading on the ammeter Do not allow the battery voltage to drop below 12 0 volts This ammeter reading is the maximum output of the alternator GM DIODE TRIO TEST The diode is located inside the GM alternator and must be checked The diode trio is located inside a
12. l of Battery 1 and the negative heavy duty lead to the negative terminal of Battery 2 FIGURE 5 m The voltage read under load from the positive terminal of 2 The light gauge leads will be used to read voltages across Battery 1 to the negative terminal of Battery 2 is the sum of the Battery 1 the cable connection and Battery 2 so the voltage drops across Batteries 1 2 and the cable jumper VOLTS switch should be in the EXT position m Total voltage B1 voltage B2 voltage jumper voltage drop 3 Apply the proper load to the batteries for 15 seconds At E f you had two good batteries and a bad jumper connection the that time and with the load on read the voltage of Battery total voltage may be less than acceptable If the batteries were 1 red lead to positive black lead to negative the cable replaced the new ones may test bad due to the bad jumper red lead to Battery 1 negative and black lead to connection Replacing or cleaning a bad jumper cable is Battery 2 positive and Battery 2 red lead to positive cheaper and easier than replacing batteries if that is all that is black lead to negative needed 4 Turn load off and evaluate the results Voltage drop In another situation you may have one good battery a good across the cable jumper should be 0 2 volts or less If jumper connection and one bad battery If the good battery there is any question check the service manual of the voltage is high enough to offset the bad b
13. ll counter clockwise position when disconnecting or connecting heavy duty leads to prevent arcing 2 Never block ventilating holes on the top or the bottom of the unit This will shorten the carbon pile life 3 STEAM AND ODORS MAY BE RELEASED FROM CARBON PILE LOAD ASSEMBLY ANYTIME IT IS USED THE CARBON DISCS ABSORB MOISTURE AND ODORS AS WOULD AN ACTIVATED CARBON FILTER THESE ARE RELEASED WHEN THE CARBONS ARE HEATED 4 A duty cycle is hard to define for a carbon pile load assembly Size of load length of test time between tests ambient temperature and other factors affect the duty cycle For the longest life never let the carbon discs get red hot This can be easily seen when running the load test If the discs get red hot the binder material holding the carbon granules together will start to deteriorate and lead to shortened disc life 5 For the ammeter to read amps attach current probe so arrow on probe points in direction of current flow from positive to negative 6 Residual magnetism in the AMPS PICKUP may cause it to indicate a low current even if there is no current flow This is a normal situation Therefore the AMPS meter has to be zeroed before each use This can be done with the AMPS ZERO ADJUST knob 7 Inthe booklet the word positive refers to the red clamp or lead The word negative refers to the black clamp or lead 8 Positive when referring to a battery terminal will mean the one marked Pos P
14. luate positive terminal of Battery 2 we will check the connection the battery based on this voltage EXT INT between the batteries at the same time Attach the negative 5 Evaluate the cable jumper between the batteries based on the light gauge voltage lead to the positive terminal of Battery 2 voltage read on the EXT position A typical acceptable voltage and the positive light gauge lead to the negative terminal of drop is 0 2 volts Check the service procedure for the vehicle if Battery 1 See figure 4 there is any question about the acceptable voltage drop 3 Run the battery load test on battery 2 At the end of the 15 USE THIS SECTION FOR BATTERY TESTING IF YOU RE 12 24 VOLT Sued LOOK SIMILAR TO THIS One six volt battery by itself cannot be tested with this unit It will not provide enough power under load to allow the digital circuitry to work m Please note When two six volt batteries are connected in series the voltage of the array is 12 The CCA rating of the series does not double It is the same CCA as either of the individual batteries If you have two 500 CCA 6 volt batteries in series BATTERY 1 BATTERY 2 EE ath it is equivalent to a 500 CCA 12 volt battery and Da e gt _a should be tested with a 250 amp load m Both the heavy duty and light gauge leads will be te ty 6V 6V used in this test 1 Attach the positive heavy duty lead to the BATTERY 3 BATTERY 4 positive termina
15. mage if accidentally shorted out when in use Heavy duty leads are single extended so the may be used for testing at points up to 15 feet apart The clamps on the heavy duty lead are vinyl dipped and have a flexi spring stain relief to prevent cable damage Solid copper jaws provide better electrical conduction and are field replaceable Heavy duty leads have internal tracer lead wires for voltage readings where the clamps are attached when the VOLTS switch is in the internal INT position These leads should not be attached to any voltage source that could rise above 35 VDC The light gauge voltage sensing leads red and black have small test clips to allow testing at points where the heavy duty leads can not reach Use the leads when the VOLTS switch is in the external EXT position The leads can test points in a vehicle up to 15 feet apart and read voltages up to 99 9 VDC The inductive AMPS PICKUP has 10 foot long lead to allow for testing in hard to reach areas All leads are long enough to test trucks high rise four wheel drive or off road vehicles The cart has a long wheelbase for greater stability when moved over rough surfaces or cracked floors IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS The safety information contained herein should be reviewed every time the unit is used BATTERY SAFETY ALWAYS WEAR EYE PROTECTION WHEN WORKING NEAR A BATTERY CAUTION The electrolyte in automotive bat
16. nnecting the battery leads to the distributor STARTER YY HEI Be sure that any leads that are removed are SOLENOID insulated to prevent shorting to ground m Review the Safety section in the front of this manual BLACK 1 Attach the heavy duty leads to the battery as 8 LEAD shown Attach the AMPS PROBE around the lead from the positive battery terminal to the starter If that cable is not accessible it may be placed around the ground cable that runs from Paar FIGURE 8 the frame or engine block to the negative battery terminal Excessive voltage drop in either cable caused by loose or Make sure VOLTS switch is in INT position corroded connections undersized or broken wires may be the 2 Be sure that all the lights and accessories are turned off problem not the starter 3 Crank the engine while watching both the VOLTS meter and the AMPS meter After 2 3 seconds of cranking the PROPER TEST PROCEDURE IS AS FOLLOWS readings should be fairly stable If not continue cranking 1 Attach tester to battery as shown Switch VOLTS to EXT until they are stable Under no condition should you crank position S l more than 10 seconds at a time 2 Attach positive light gauge lead to positive battery terminal 4 Minimum acceptable voltage for most vehicles while Attach negative light gauge lead to starter solenoid where the cranking is 9 6 volts Typical starting currents for vehicles lead from the battery terminates are 3 oan engine and read voltage d
17. output terminal of the alternator is inaccessible the positive lead may be connected to the positive terminal of the battery and the test run as described The accuracy of the test may be affected by loose or corroded terminals or an undersized cable Attach leads to rear of alternator if possible SCREWDRIVER RED LEAD TERMINAL 1 ALTERNATOR PLUG FIGURE 10 REGULATOR FIGURE 11 7 Adjust the lead applied to the battery to give the maximum current reading without dropping the voltage below 12 0 volts 8 Release the FIELD switch and turn off the load on the battery 9 If the alternator output is not at least tested 90 of its rated output repair or replace the alternator If the current reading on the ammeter is within 10 of the manufacturer s rating the alternator is good and the regulator should be replaced if the wiring to it is found to be good by these checks A GM ALTERNATOR HAS A DIFFERENT PROCEDURE FOR FULL FIELDING 1 Locate a D shaped hole in the rear of the alternator 2 Insert a small screwdriver or any other metal rod in the hole until you contact a metal tab less than 3 4 inch Ground the screwdriver or rod to the case and apply a load per above instructions MEASURING SMALL CURRENTS The BEST tester will measure currents down to one amp in value If smaller currents need to be measured follow the steps below TO CHECK CURRENT DRAW OF A SPECIFIC ELECTRICAL DEVICE 1 Attach unit to batter
18. rop of cable when readings i stabilize r ia ae nioan z ee te 4 Repeat the same procedure checking the voltage drop across 8 cylinder gas engine up to 250 amps the solenoid negative lead to starter side of solenoid 8 cylinder gas engine up to 650 amps 5 Repeat again checking the voltage drop between the solenoid m The vehicle service manual should be consulted for more and the starter Positive lead at solenoid negative lead at detailed information While the vehicle is cranking you should starter listen for high pitch or low growling sounds that may indicate 6 Repeat again checking the ground cable from the battery to bearing or other problems the engine block Positive lead to engine block negative lead m Connections between the battery and starter and between the to battery negative terminal battery and frame should also be checked at this time 7 Acceptable voltage drop on any wire lead should be 0 2 volts or less Voltage drop across the starter solenoid should 0 3 volts or less Check vehicle service manual for further details CHARGING SYSTEM TESTS Please review all the safety instructions in the front of ALTERNATOR this manual before running these tests Charging problems can be caused by a number of different things These can include loose belts defective diodes or stators defective regulators corroded or loose connections or defective diode trios GM cars Undercharging will shorten battery life and
19. ter with the AMPS ZERO ADJUST knob to determined number give a reading of 000 3 Adjust the load as needed to maintain the voltage for 15 seconds Note current at 15 seconds and turn load off 4 Multiply the current reading by 2 to determine the CCA rating of the battery Check vehicle manufacturer s recommendation for the proper battery CCA and compare to your results TESTING 12 24 VOLT SYSTEMS For best results in a 12 24 volt system that has batteries connected per the diagram above each battery should be tested separately and the connection between the batteries tested at the same time Both battery tests should be run as described in the previous section 6042 RED BLACK LEAD LEAD BATTERY 1 BATTERY 2 BATTERY 1 BATTERY 2 FIGURE 3 FIGURE 4 PROPER TEST PROCEDURE IS AS FOLLOWS seconds and with the load still on the battery switch VOLTS to 1 Attach heavy duty leads to Battery 1 and run battery load test EXT position and read the voltage drop across the cable Evaluate the results See figure 3 connecting the 2 batteries Turn load off and evaluate results 2 Attach the negative heavy duty lead to the negative terminal of 4 To evaluate the battery load test the voltage drop read across Battery 2 Attach the positive heavy duty to the negative the cable EXT position has to be added to read the voltage on terminal of Battery 1 By attaching at that point and not at the the INT position to give the proper battery voltage Eva
20. teries is sulfuric acid which is capable of causing severe damage to skin eyes and clothing When contact with battery acid occurs proceed as follows 1 Eyes Force open and flood with cool running water at least for 10 minutes then see a doctor Never use eye drops or other medication before seeing a doctor 2 Remove contaminated clothing and flood skin for at least 10 minutes with clear cool water While batteries are being charged or tested an explosive gas mixture forms inside each cell Some of this gas escape through the vent holes in the filler caps and may remain around the battery in an explosive condition Sparks or flames igniting this gas mixture will burn back through the vent hole and explode inside the battery cell Such an explosion is dangerous not only because of its own force but also because of the acid electrolyte which could spray onto anything in the vicinity TO PREVENT EXPLOSIONS 1 Use well ventilated areas for charging and testing batteries 2 Allow no smoking sparks or open flames near batteries being charged tested or batteries recently charged or tested 3 Do not break live electrical circuits at the terminals of batteries because a spark may occur at that point causing an explosion Always turn battery chargers or tester OFF before connecting or disconnecting the clamps from the battery terminals PERSONAL PRECAUTIONS 1 Wear complete protection and avoid touching eyes while working near
21. ttery under load determine whether a battery is good or not 5 Apply a load to the battery of a 1 2 the CCA rating for 3 seconds to remove any surface charge If the voltage has fallen below 2 Before testing the battery be sure that 12 4 volts recharge and retest Battery terminals are clean 6 Ifthe battery is adequately charged apply a load to the battery TiS battery does not nave any ny sical Gamage of the CCA rating of the battery for 15 seconds Adjust the The battery is not frozen The LOAD ADJUST knob is in the full counter clockwise a ea a e e E a oe position The minimum acceptable voltage for a battery at the different temperatures is as follows BATTERY TEMPERATURE COMPENSATION 15 SECOND LOAD TEST joe vor oo so ao so 20 10 o 12 VOLT f ee ee eee VLT PROPER TEST PROCEDURE IS AS FOLLOWS 1 Attach red and black heavy duty leads to the positive and negative battery posts Twist or rock clamps back and forth IF THE CCA OF THE BATTERY IS NOT KNOWN IT CAN BE several times to make a good connection Be sure the VOLTS DETERMINED BY THE FOLLOWING PROCESS switch is in INT position 1 Determine the temperature of the battery and find the minimum 2 Attach the AMPS PICKUP around either lead of the tester Be accepted voltage from the chart above sure the arrow points in the direction of the current flow 2 Apply a load to the battery until the voltage reaches the above 3 Adjust the AMPS me
22. ver and look at the back of the circuit board There are two LED s in the top middle of the board If both of these are lit there is a problem on the circuit board that must be diagnosed by a factory technician If one LED is lit the fuse on the rear of the board is blown and should be replaced Replace with an AGC 1 fuse The fuse blew to protect the board against an over voltage situation that would have damaged the solid state components on the board If neither LED is lit there is no incoming power to the circuit board Check for good connection at the battery Also check with an ohmmeter the tracer lead in the heavy duty leads to be sure there is a circuit from the clamp jaws to the power strip on the circuit board ASSEMBLY INSTRUCTIONS Parts included with this unit are listed in the part list Item numbers appear on the exploded view part list and throughout the text for easy reference j m OON O18 Nome QTY DESCRIPTION Wee EE T P OE A Lower Tray ae aaa A AAE EE E E titanate Upper Tray r E E A A Back Legs Ya 20x2 Bolts dsavesess V4 Washers QO EEA TE diese devneceehaevidesrees 14 20 Hex Nuts E A EE EE E E ce hon eevee T Front Legs Top Plate B E S T Control Unit Le AMC ice a i rT CEE Plastic Feet ERTE NERE itt Soe 10x1 1 4 Machine Screws AS 1 SEMBLING THE CART Place lower tray 1 and upper tray 2 on flat surface Align the lower holes in back leg 3 with holes in
23. y as shown 2 Disconnect the power lead to the device under test 3 Coil the field lead of the unit 10 times around your hand and connect the clip to the power input terminal of the device under test 4 Clip the AMPS PICKUP around the 10 turns of wire 5 Press the FIELD switch to the B position and read the ammeter on the unit 6 Divide the ammeter reading by 10 to give the actual current draw of the device under test DISCONNECT POWER TO DEVICE UNDER TEST DEVICE UNDER TEST If the regulator is determined to be bad check that it is making a good ground connection to the vehicle chassis Also check that the wire from the regulator to the alternator field terminal is making good connections and does not have any breaks in it BLUE LEAD FIELD TO CHECK CURRENT DRAW OF ENTIRE ELECTRICAL SYSTEM 1 Disconnect the negative load from the battery 2 Attach unit as shown See figure 13 3 Clip blue lead to the negative wire just removed from the battery 4 Wrap the blue lead around your hand 10 times and clip AMPS PICKUP around the coil 5 Push FIELD switch to the A position Read the ammeter Release switch 6 Divide ammeter reading by 10 to give the total current draw of the vehicle from the battery FRAME BLUE LEAD FIELD FIGURE 13 6042 B E S T TESTER TROUBLE SHOOTING HINTS If the meter displays fail to light when the unit is connected to a charged battery remove the unit s co
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