Headlamps Inoperative - High Beams
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Headlamps Inoperative - High Beams
| 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 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Is only one high beam headlamp inoperative? | Go to Step 15 | Go to Step 4 |
| 4 | Place the headlamp dimmer switch in to the FTP position. Do the high beam headlamps illuminate? |
Go to Step 7 | Go to Step 5 |
| 5 |
|
Go to Step 9 | Go to Step 6 |
| 6 |
|
Go to Step 10 | Go to Step 14 |
| 7 |
|
Go to Step 12 | Go to Step 8 |
| 8 | Test for poor connection, short to battery positive voltage or an open in the headlamp dimmer switch high beam signal circuit. Refer to Circuit Testing
andWiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 20 |
| 9 |
|
Go to Step 11 | Go to Step 20 |
| 10 | Test for a short to battery positive voltage, a poor connection or an open in the headlamp high beam relay control circuit. Refer to Circuit Testing
andWiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 13 |
| 11 | Test for a poor connection or an open in the ground circuit of the turn signal/multifunction switch. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 12 |
| 12 | 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 21 | Go to Step 16 |
| 13 | Inspect for a poor connection at the harness connector of the HI BEAM relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 17 |
| 14 | Inspect for a poor connection at the harness connectors of the underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 21 | Go to Step 18 |
| 15 | Inspect the inoperative high beam headlamp battery positive voltage supply and ground circuit for the following:
Refer to Circuit Testing andWiring Repairs . Did you find and correct the condition? |
Go to Step 21 | Go to Step 19 |
| 16 | Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement
. Did you complete the replacement? |
Go to Step 21 | - |
| 17 | Replace the HI BEAM relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
. Did you complete the replacement? |
Go to Step 21 | - |
| 18 | Replace the underhood fuse block. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
. Did you complete the repair? |
Go to Step 21 | - |
| 19 | Replace the inoperative high beam headlamp. Refer to Headlamp Assembly or Headlamp Bulb Replacement . Did you complete the replacement? |
Go to Step 21 | - |
| 20 | Replace the BCM. Refer to Control Module References for replacement, setup and programming. | Go to Step 21 | - |
| 21 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |