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 | |
2 |
Do the low beam headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Is only one low beam headlamp inoperative? | Go to Step 4 | Go to Step 5 |
4 | Test the headlamp low beam supply voltage and ground circuits for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 16 | Go to Step 9 |
5 |
Does the scan tool display On? | Go to Step 14 | Go to Step 6 |
6 | Disconnect the multifunction switch. Do the low beam headlamps illuminate? | Go to Step 7 | Go to Step 11 |
7 | Test the headlamp dimmer switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct a condition? | Go to Step 16 | Go to Step 8 |
8 | Test the headlamp switch flash to pass signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct a condition? | Go to Step 16 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the inoperative bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
10 | Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
11 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
12 | Replace the inoperative bulb. Refer to Headlamp Bulb Replacement. Did you complete the replacement? | Go to Step 16 | -- |
13 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 16 | -- |
14 | Replace the low beam relay. Refer to Relay Replacement. Did you complete the replacement? | Go to Step 16 | -- |
15 | Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement. Did you complete the repair? | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |