USING MICRO 420 BATTERY TESTER (GASOLINE ENGINES)



NOTE: The Micro 420 Battery Tester should only be used to test vehicles equipped with gasoline engines. If the vehicle being tested has a diesel engine the OTC One Step Battery Analyzer and Charger special tool number OT-3641 or equivalent should be used to test the battery.

Always use the Micro 420 Instruction Manual that was supplied with the tester as a reference. If the Instruction Manual is not available the following procedure can be used:

WARNING: Always wear appropriate eye protection and use extreme caution when working with batteries.


BATTERY TESTING




NOTE: Multiple batteries connected in parallel must have the ground cable disconnected to perform a battery test. Failure to disconnect may result in false battery test readings.


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CAUTION: If REPLACE BATTERY is the result of the test, this may mean a poor connection between the vehicle's cables and battery exists. After disconnecting the vehicle's battery cables from the battery, retest the battery using the OUT-OF-VEHICLE test before replacing.



BATTERY TEST RESULTS
  
GOOD BATTERY
  		Return to service
  
GOOD - RECHARGE
  		Fully charge battery and return to service
  
CHARGE & RETEST
  		Fully charge battery and retest battery
  
REPLACE BATTERY
  		Replace the battery and retest complete system
  
BAD-CELL REPLACE
  		Replace the battery and retest complete system
  

NOTE: The SERVICE CODE is required on every warranty claim submitted for battery replacement.