Fog lights (vehicles after 08.2001) — diagnostics and checks

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Special tool


Digital multimeter 105-R0051 or equivalent
Electrical probe kit 29-011A

Inspection and verification


1. Check the customer's complaint.

2. Perform a visual check for obvious signs of mechanical or electrical damage.

Visual Inspection Table


Electrical factors:
  • Fuse (And)
  • Lamp (s)
  • electrical connector (s)
  • Wiring harness

3. If an obvious cause of the problem you identified or described by the client is found, eliminate it before proceeding to further actions (if possible).

4. If the problem is not visually obvious, check the symptom and refer to the Symptom Chart.

Symptom table


State

Possible Causes

Action

•Fog lights do not work

•Electrical circuit (And)

•Fuse

•Light switch

• Go to PINPOINT TEST AQ

•Front fog lights do not work

•Electrical circuit (And)

•Light switch

• Go to PINPOINT TEST AR

•Rear fog lights not working

•Electrical circuit (And)

•Light switch

• Go to PINPOINT TEST AS

•Separate fog lamp/lantern (And) does not work

•Electrical circuit (And)

•Fog lamp/lantern

• Rear fog lamp / rear lamp assembly

• Go to PINPOINT TEST AT

•Front fog lights always on

•Electrical circuit (And)

•Light switch

• Go to PINPOINT TEST AU

•Rear fog lights always on

•Electrical circuit (And)

•Light switch

• Go to PINPOINT TEST AV

• Fog lights always on - vehicles with front fog lights

• Lighting switch.

• INSTALL a new light switch. Check the correct operation of the system.








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