Step | Action | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Master Electrical Component List | |||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||||
2 |
Do the high beams illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | ||||||||
3 | Is only one high beam headlamp inoperative? | Go to Step 11 | Go to Step 4 | ||||||||
4 | Using a scan tool, observe the High Beam Switch parameter. Does the parameter indicate ON? | Go to Step 9 | Go to Step 5 | ||||||||
5 |
Do the high beam headlamps illuminate? | Go to Step 8 | Go to Step 6 | ||||||||
6 | Test for high resistance or an open in the headlamp dimmer switch high beam signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 10 | ||||||||
7 | Test the ground circuit of the multifunction switch C2 Pin D for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 8 | ||||||||
8 | Inspect for a poor connection at the harness connector of the multifunction turn signal 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 12 | ||||||||
9 | Inspect for a poor connection at the harness connector of the high beam relay. 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 | ||||||||
10 | Inspect for a poor connection at the harness connectors of the body control module (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 15 | ||||||||
11 | Test the inoperative high beam headlamp supply voltage and ground circuit for the following conditions:
Did you find and correct the condition? | Go to Step 16 | Go to Step 14 | ||||||||
12 | Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | Go to Step 16 | -- | ||||||||
13 | Replace the high beam relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 16 | -- | ||||||||
14 | Replace the inoperative high beam headlamp. Refer to Headlamp Bulb Replacement . Did you complete the replacement? | Go to Step 16 | -- | ||||||||
15 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 16 | -- | ||||||||
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||||||
