Headlamps Inoperative - Low Beams Standard
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views , Secondary/Configurable Control Connector End Views , or Data Communication Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Verify that the low beam headlamps are inoperative. 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 |
Did you complete the repair? | Go to Step 14 | -- |
5 | Test the headlamp switch signal and ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 14 | Go to Step 6 |
6 |
Do the low beam headlamps illuminate? | Go to Step 9 | Go to Step 7 |
7 | Connect a fused jumper from ground to the headlamp driver module control circuit terminal at the headlamp driver module (HDM) in the underhood fuse block. Do the low beam headlamps illuminate? | Go to Step 10 | Go to Step 8 |
8 | Test the headlamp driver module ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 14 | Go to Step 12 |
9 | Inspect for poor connections at the harness connector of the headlamp multifunction switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
10 | 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 14 | Go to Step 11 |
11 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | -- |
12 | Replace the HDM. Refer to Relay Replacement . Did you complete the repair? | Go to Step 14 | -- |
13 | Replace the headlamp multifunction switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the repair? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Headlamps Inoperative - Low Beams TT6 HID
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 or Data Communication Connector End Views | |||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||
2 | Verify that the low beam high intensity discharge (HID) headlamps are inoperative. Do the low beam HID headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | ||||
3 | Is only one low beam HID headlamp inoperative? | Go to Step 4 | Go to Step 5 | ||||
4 | Test for an open, high resistance or short to ground in the low beam headlamp supply voltage circuit or ground circuit up to the forward lamp harness connector at the inoperative headlamp housing. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 13 | ||||
5 | Test the headlamp dimmer switch signal and ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 14 | Go to Step 6 | ||||
6 |
Do the low beam HID headlamps illuminate? | Go to Step 8 | Go to Step 7 | ||||
7 | Connect a fused jumper from ground to the low beam headlamp relay control circuit terminal at the low beam headlamp relay in the underhood fuse block. Do the low beam HID headlamps illuminate? | Go to Step 9 | Go to Step 11 | ||||
8 | 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 14 | Go to Step 12 | ||||
9 | 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 14 | Go to Step 10 | ||||
10 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 14 | -- | ||||
11 | Replace the low beam headlamp relay. Refer to Relay Replacement . Did you complete the repair? | Go to Step 14 | -- | ||||
12 | Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the repair? | Go to Step 14 | -- | ||||
13 | Replace each individual component, one at a time, with a known good part to determine which component is causing the concern. Refer to: Did you identify and replace the component causing the condition? | Go to Step 14 | -- | ||||
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||
