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 | Remove the appropriate component either the headlamp module for low beams or HI BEAM relay for high beams. Do the lamps turn OFF? |
Go to Step 5 | Go to Step 4 |
| 4 | Repair a short to battery positive voltage in the supply circuit of the affected headlamps. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 13 | - |
| 5 |
|
Go to Step 12 | Go to Step 6 |
| 6 | Are the high beam headlamps on at all times? | Go to Step 7 | Go to Step 8 |
| 7 | Test for a short to ground in FTP circuit and the headlamp dimmer switch high beam signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 9 |
| 8 | Test for a short to ground in the headlamp switch ON signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 9 |
| 9 | Disconnect the body control module (BCM) connector C1. Do the headlamps turn OFF? |
Go to Step 14 | Go to Step 10 |
| 10 | Test for a short to ground in the affected low or high beam relay control circuit. 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 appropriate headlamp module or HI BEAM relay. Refer to Relay Replacement (Attached to Wire Harness)
or Relay Replacement (Within an Electrical Center)
. Did you complete the replacement? |
Go to Step 14 | - |
| 12 | Replace the lamp switch assembly. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the BCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
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 |