Checking the Ground Terminal, Audio Module (AUM)

CHECKING THE GROUND TERMINAL, AUDIO MODULE (AUM)

Connecting the breakout box



Connect the breakout box according to Connecting the Breakout Box, Audio Module (AUM)


Checking ground terminal



- Ignition off.
- Main unit disconnected.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).

Connect an ohmmeter between terminal #26 on the breakout box and the battery negative terminal.

The ohmmeter should read approximately 0 ohms.
OK - Testing Complete.
Not OK - Continue below.


Checking for open-circuits, contact resistance and oxidation



Check ground terminal 31/84 and the wiring connected to it for an open-circuit and contact resistance and oxidaUon according to Checking Wiring and Terminals - Permanent Faults


Verification



- Ignition off.
- Module disconnected.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).

Connect an ohmmeter between terminal #26 on the breakout box and the battery negative terminal.

The ohmmeter should read 0 ohms.
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should be diagnosed and remedied.
Since this is not the case the fault-tracing process has failed.