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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting Systems >> Diagnostic Information and Procedures >> Fog Lamps Always On

Fog Lamps Always On

Fog Lamps Always On

Step Action Yes No
Schematic Reference: Fog Lights Schematics 
Connector End View Reference: Lighting Systems Connector End Views  or Data Communication Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Verify that the front fog lamps are always ON.
Do the front fog lamps operate normally?
Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Remove the front fog lamp relay.
Do the front fog lamps turn OFF?
Go to Step 4  Go to Step 6 
4
  1. Ensure that the front fog lamp switch is in the OFF position.
  2. Test for a ground signal at the front fog lamp relay control circuit terminal in the underhood fuse block. Refer to Circuit Testing .
Was a ground signal found?
Go to Step 5  Go to Step 8 
5 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 9  Go to Step 7 
6 Repair the short to voltage in the front fog lamp supply voltage circuit. Refer to Wiring Repairs .
Did you complete the repair?
Go to Step 9  -
7 Replace the BCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?
Go to Step 9  -
8 Replace the front fog lamp relay. Refer to Relay Replacement (Attached to Wire Harness) or Relay Replacement (Within an Electrical Center) .
Did you complete the repair?
Go to Step 9  -
9 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3