LEMON Manuals: Even more car manuals for everyone
Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting Systems >> Diagnostic Information and Procedures >> Headlamps Inoperative - Flash to Pass

Headlamps Inoperative - Flash to Pass

Headlamps Inoperative - Flash to Pass

Step Action Yes No
Schematic Reference: Headlights/Daytime Running Lights (DRL) 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 flash to pass (FTP) is inoperative.
Does the FTP operate normally?
Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 Do the high beam headlamps operate normally? Go to Symptoms - Lighting Systems  Go to Step 4 
4
  1. Turn the key to RUN with the engine OFF.
  2. Connect a fused jumper from ground to the headlamp switch flash to pass signal terminal of the headlamp dimmer switch connector.
Do the high beam headlamps illuminate?
Go to Step 6  Go to Step 5 
5 Test the headlamp switch flash to pass signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct a condition?
Go to Step 10  Go to Step 7 
6 Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 10  Go to Step 9 
7 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 10  Go to Step 8 
8 Replace the BCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?
Go to Step 10  -
9 Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement .
Did you complete the repair?
Go to Step 10  -
10 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3