Checking the DAH Control Module Power Supply and Ground

Checking the DAH Control Module Power Supply and Ground Connection







Unplug the connector
- Auxiliary heater, DAH (597)







- Turn the ignition switch to the ON position.












- Connect test lamp 86 11 857 to pin 1 of the female connector and a good grounding point.







- The test lamp should light.

Checking the wiring harness.
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead - II

YES - Continue with Checking the DAH Control Module Power Supply and Ground Connection







- Connect test lamp 86 11 857 to pins 1 and 2 of the female connector.







- The test lamp should light.

Checking the wiring harness.
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead - II

YES - Final Check