Step | Action | Yes | No | ||||
---|---|---|---|---|---|---|---|
Caution: The high intensity discharge system produces high voltage and current.
To reduce the risk of severe shocks and burns:
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems 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 8 | ||||
4 |
Did you find and correct the condition? | Go to Step 19 | Go to Step 5 | ||||
5 | Test the headlamp low beam supply voltage circuit of the inoperative headlamp before the ballast connector 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 19 | Go to Step 6 | ||||
6 | Test the ground circuit of the inoperative headlamp before the ballast connector for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 7 | ||||
7 | Install a known good headlamp bulb. Refer to Headlamp Bulb Replacement . Does the lamp operate properly? | Go to Step 19 | Go to Step 12 | ||||
8 |
Does the scan tool display On? | Go to Step 17 | Go to Step 9 | ||||
9 |
Do the low beam headlamps illuminate? | Go to Step 13 | Go to Step 10 | ||||
10 | Test the turn signal multi function headlamp dimmer switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 11 | ||||
11 | Test the turn signal multi function headlamp switch flash to pass signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 14 | ||||
12 | Inspect for poor connections at the harness connector of the ballast. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 15 | ||||
13 | Inspect for poor connections at the harness connector of the turn signal multi function headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 18 | ||||
14 | 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 19 | Go to Step 16 | ||||
15 | Replace the headlamp ballast. Refer to Headlamp Replacement or Headlamp Bulb Replacement . Did you complete the replacement? | Go to Step 19 | -- | ||||
16 | Replace the BCM. Refer to Control Module References for BCM replacement, setup, and programming. Did you complete the replacement? | Go to Step 19 | -- | ||||
17 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement . Did you complete the replacement? | Go to Step 19 | -- | ||||
18 | Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the repair? | Go to Step 19 | -- | ||||
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |