Battery Not Operating Properly
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.IMPORTANT: The battery test that uses J 42000 the Battery Tester requires correct connections to the battery terminals. A failure to obtain the correct connections during the test may result in replacing the battery unnecessarily. In order to avoid an incorrect diagnosis because of poor connections, use to the following instructions:
^ When testing the vehicle with the battery cables still connected, rock the J 42000 clips backward and forward on the terminal bolt in order to cut through any coating or any oxidation that may be present on the bolt.
New bolts contain a protective coating that may insulate or cause a resistance in the test circuit.
^ If you are not sure that correct connections can be made to the battery terminal bolts in the vehicle, perform the following steps:
1. Disconnect the battery cables.
2. Install the test adapters on the terminals.
3. Test the battery off the vehicle by using the following instructions:
^ If a REPLACE BATTERY result is obtained for a battery that is tested in the vehicle with the battery cables connected, perform the following steps:
1. Disconnect the battery cables.
2. Install the approved adapters.
3. Test the battery off the vehicle by using the following instructions:
4. Replace the battery only if the second test shows a REPLACE BATTERY result.
In order to comply with the warranty, use the test code from the second test.
^ Use the approved terminal adapters.
Do not use any common bolts or a combination of the bolts, of the nut, and of the washers as adapters when testing the battery.
Use the test adapters that are provided with the J 42000 tester, or use the GM P/N 12303040 terminal adapters. If the adapters that are provided with the J 42000 tester require replacement, only use adapters with the GM P/N 12303040. Any other adapters may not contact the correct areas of the battery terminal, causing resistance that may result in an incorrect battery test result.
^ Test the top terminal of the threaded stud batteries off the vehicle by using the GM P/N 12303040 adapters.
Do not connect the tester to the plain threaded terminals.
IMPORTANT: In order to comply with the warranty, always place the test code that is displayed by the tester on the repair order. The number is a unique description of the test data for a particular battery at a particular time.
Although the test code may sometimes repeat when retesting the same battery, more often, a different code will result each time that the battery is tested.
TEST DESCRIPTION
