Headlamps Inoperative - High Beams Standard
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Lighting Systems Diagnostic System Check? | -- | Go to Step 2 | |
2 | Verify that the high beam headlamps are inoperative. Do the headlamps operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 4 |
4 | Locate and repair the open or high resistance in CKT 524 (PPL) between the headlamp high beam bulbs and the multifunction switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
5 |
Do the high beams illuminate? | -- | Go to Step 6 | Go to Step 7 |
6 | Replace the multifunction switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Standard or Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle Steering Wheel and Column - Tilt. Is the repair complete? | -- | Go to Step 10 | -- |
7 | Remove the Headlamp Grounding Relay from the Body Relay Block and install a fused jumper between terminal 30 and terminal 87A of the relay socket. Do the high beams illuminate? | -- | Go to Step 9 | Go to Step 8 |
8 | Locate and repair open in CKT 10 (YEL) or CKT 1850 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
9 | Replace the Headlamp Grounding Relay. Is the repair complete? | -- | 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 |
Headlamps Inoperative - High Beams Envoy/Diamond Edition 1SK
Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |||||
2 | Verify that the high beam headlamps are inoperative. Do the headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 | Turn the headlamp switch to HEAD with the multifunction headlamp dimmer switch in the high beams position. Using the scan tool, check the High Beam Switch Input. Does the scan tool show the switch is ON? | Go to Step 5 | Go to Step 4 | ||||
4 | Test the following circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems:
Did you find and correct the condition? | Go to Step 12 | Go to Step 10 | ||||
5 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 6 | ||||
6 | Test the headlamp relay coil supply voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 | ||||
7 | Install a fused jumper between the high beam relay battery positive voltage circuit terminal and headlamp supply voltage circuit terminal at the relay socket. Refer to Electrical Center Identification Views in Wiring Systems. Do the high beam headlamps operate? | Go to Step 11 | Go to Step 8 | ||||
8 | Repair the open, high resistance or short to ground in one of the following circuits. Refer to Wiring Repairs in Wiring Systems:
Did you complete the repair? | Go to Step 12 | -- | ||||
9 |
Important:: Perform the setup procedure for the Body Control Module (BCM). Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 12 | -- | ||||
10 | Replace the Multifunction Switch (High Beam/Flash-to-Pass Switch). Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle Steering Wheel and Column - Tilt. Is the repair complete? | Go to Step 12 | -- | ||||
11 | Replace the high beam relay. Did you complete the repair? | Go to Step 12 | -- | ||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
