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

Marker Lamps Inoperative

Marker Lamps Inoperative

Step Action Yes No
Schematic Reference: Exterior Lights Schematics 
Connector End View Reference: Lighting Systems 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 marker lamps are inoperative.
Do the marker lamps operate normally?
Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Place the headlamp switch in the PARK position.
Do the park lamps operate normally?
Go to Step 4  Go to Symptoms - Lighting Systems 
4 Inspect the inoperative bulb and socket for an open filament or poor terminal connections.
Does any lamp have an open filament or poor terminal connections?
Go to Step 6  Go to Step 5 
5 Repair the open or high resistance in one of the following circuits. Refer to Wiring Repairs :
  • Marker lamp supply voltage
  • Front turn signal lamp supply voltage-Domestic vehicle only
  • Ground-Export vehicle only

Did you complete the repair?
Go to Step 7  -
6 Replace the defective bulb or repair/replace the socket. Refer to Wiring Repairs .
Did you complete the repair?
Go to Step 7  -
7 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3