3-12 Engine Electrical Industrial 1.6L
Battery Terminal Check (cont’d)
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Battery Not Operating Properly
Notice: Always turn the ignition switch OFF when
connecting or disconnecting batteries, battery chargers,
or jumper cables. Failure to do so may damage the
electronic control unit or other electrical components.
Important: The battery test using the J 42000 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. Adhere to the following instructions in
order to avoid an incorrect diagnosis due to poor
connections:
• When testing the equipment with the battery
cables still connected, rock the J 42000 clips
back and forth on the terminal bolt in order to
cut through any coating or oxidation that may
be present on the bolt.
• Even new bolts contain a protective coating
that may insulate or cause a resistance in the
test circuit.
• If it is uncertain that correct connections can
be made to the battery terminal bolts in the
equipment, perform the following steps:
1. Disconnect the battery cables.
2. Install the test adapters on the terminals.
3. Follow the instructions for testing the
battery outside of the equipment.
• If a REPLACE BATTERY result is obtained for
a battery tested in the equipment with the
battery cables connected, perform the following
steps:
1. Disconnect the battery cables.
2. Install the approved battery terminal
adapters.
3. Follow the instructions for testing the
battery outside of the equipment.
4. Replace the battery only if the second test
shows a REPLACE BATTERY result.
• For warranty purposes, use the test code
from the second test.
• On side post batteries, use the approved
terminal adapters. Do not use any common
bolts or a combination of bolts, nut, and
washers as adapters when testing the battery.
• Use the test adapters that are provided with
the J 42000 tester or GM part number
12303040 terminal adapters. If the adapters
that are provided with the J 42000 tester
require replacement, only use adapters with
the GM part number 12303040. Any other
adapters may not contact the correct areas of
the battery terminal, causing resistance that
may result in an invalid battery test result.
• In order to test the top terminal, threaded stud
batteries outside of the equipment, use GM
part number 12303040 adapters. Do not
connect the tester to the plain threaded
terminals.
Important: For warranty purposes, always place the
test code displayed by the tester on the repair order.
The number is a unique identifier that describes the
test data for a particular battery at a particular time.
While the test code may occasionally repeat when
retesting the same battery, it is more likely that a
different code will result each time the battery is tested.
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