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1J-43 Charging System:
b. When the vehicle has an unacceptable amount
of parasitic current drain, remove each fuse one
at a time until the current drain falls to an
acceptable level. This will indicate which circuit is
causing the drain. Refer to "Power Distribution
Schematics: " to diagnose exactly which part of
the suspect circuit is causing the parasitic drain.
In some cases a non-fused circuit or component,
such as a relay, is the cause of excessive
parasitic current drain. If it has been determined
that the OnStar® system is the source of
parasitic load.
Battery Negative Cable Disconnection and
Connection
Removal Procedure
WARNING
!
Refer to "Battery Disconnect Caution".
1. Record all of the customers radio station presets.
2. Turn OFF all the lamps and accessories.
3. Make sure the ignition switch is in the OFF position.
4. Grasp the engine control module (ECM) and slide
the retainer rearward until the retainer disengages
from the 4 clips on the battery cover. Reposition the
ECM out of the way.
c. Repeat the parasitic current drain test procedure
d. When the cause of the excessive current drain
20. Connect the battery negative cable to the battery
negative terminal.
Repair Instructions
5. Release the side snap retainers (1).
6. Remove the battery box cover (3) from the retaining
tabs (2).
7. Remove the battery box cover (3).
after any repair has been completed to make
sure that the parasitic current drain is at an
acceptable level.
has been located and repaired, remove the J
38758.
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Troubleshooting
