Direction Indicators, No +30 Power Supply

Fault symptom
Direction indicators do not work.

Condition
No power supply (+30 circuit).

Diagnostic help
- ICE has diagnostic trouble codes
- B1432, left-hand direction indicators
- B1442, right-hand direction indicators
- B1433, power supply, direction indicators
- Service Manual 3:5 "ICE" contains fault diagnosis by diagnostic trouble code and fault diagnosis, checking the direction indicators.







Diagnostic procedure
1 Check fuse 25
- Check that fuse 25 is intact and live.
- Connect the test lamp to fuse 25 and a good grounding point.
If the output side of the fuse is live, the test lamp should light up.
Does It light up?
[YES] Continue with point 2.
[NO] Change the fuse or continue fault diagnosis as described in Service Manual 3:2 "Electrical system, +30 power supply".







2 Check the wiring connected to the VSS electronic control module
- Unplug the VSS electronic control module.
- Connect the test lamp to pins 22 and 13 of the electronic control module connector.
Does the lamp light up?
[YES] Continue with point 3.
[NO] Check the wiring harness for continuity between pin 22 of the VSS electronic control module and fuse 25, including connectors. Rectify the fault.







3 Supply power directly to the direction indicators
- Connect a jumper lead between pins 22 and 24 of the electronic control module connector.
- Connect a jumper lead between pins 22 and 12 of the electronic control module connector.
The left-hand and right-hand direction indicators respectively should light up.
Do the direction indicators light up?
[YES] Continue with point 4.
[NO] Check the wiring harness for continuity between:
- pin 24 of the VSS electronic control module and ground.
- pin 22 of the VSS electronic control module and ground.
See fault diagnosis in "Body Control Module". Rectify the fault.

4 Final test
Activate the hazard flashers and check whether they work.
Do the hazard flashers work?
[YES] The remedial measures taken were correct or the fault is of intermittent nature.
[NO] Continue as described in "Before Changing The Electronic Control Module".