Headlamps Always On - Low or High Beam
Headlamps Always On - Low or High Beam
| 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 | Turn the headlamp switch to the OFF position. Do the low and high beam headlamps remain OFF? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Are the high beam headlamps ON at all times when the low beams are ON? | Go to Step 4 | Go to Step 9 |
| 4 | Disconnect the body control module (BCM) connector C1 Are the high beam headlamps illuminated? |
Go to Step 5 | Go to Step 6 |
| 5 | Test for a short to ground in the headlamp high beam relay control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 6 |
|
Go to Step 7 | Go to Step 16 |
| 7 | Test for a short to ground in the flash to pass switch signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 8 |
| 8 | Test for a short to ground in the headlamp switch high beam signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 16 |
| 9 | Disconnect the BCM connector C2. Are the low beam headlamps ON? |
Go to Step 10 | Go to Step 11 |
| 10 | Test for a short to ground in the headlamp low beam relay control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 11 |
|
Go to Step 12 | Go to Step 15 |
| 12 | Test for the following in the headlamp switch OFF signal circuit:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
Go to Step 20 | Go to Step 13 |
| 13 | Test for a short to ground in the headlamp switch headlamps ON signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 16 |
| 14 | Inspect for poor connections at 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 20 | Go to Step 17 |
| 15 | Inspect for poor connections at the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 18 |
| 16 | Inspect for poor connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 19 |
| 17 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Bracket Replacement
. Did you complete the replacement? |
Go to Step 20 | - |
| 18 | Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement
. Did you complete the replacement? |
Go to Step 20 | - |
| 19 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
Go to Step 20 | - |
| 20 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |