Test 51A - Headlights & Parking Lamps Do Not Turn Off
NOTE:
Perform TEST 47A
before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION
. For wiring schematics, see WIRING DIAGRAMS
in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE
after each repair.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Ensure headlight switch is in OFF position. Using scan tool, read AUTO headlight switch status. If scan tool does not display AUTO HEADLIGHT STATE: ON, go to step 3). If scan tool displays AUTO HEADLIGHT STATE: ON, go to next step.
- Disconnect headlight switch connector from behind switch. Using scan tool, read AUTO headlight switch status. If scan tool does not display AUTO HEADLIGHT STATE: ON, replace headlight switch. If scan tool displays AUTO HEADLIGHT STATE: ON, repair short to battery voltage in Yellow wire.
- Ensure ignition is off. Disconnect Body Control Module (BCM) Gray connector. BCM is located behind right kick panel. If headlights go out, go to step 6). If headlights do not go out, go to next step.
- Disconnect headlight time delay relay from junction block. See Figure . Junction block is located behind end cover, on left side of instrument panel. If headlights do not go out, repair short to battery voltage in Yellow wire. If headlights go out, go to next step.
- Using scan tool in ohmmeter mode, measure resistance at terminal "E" (Red/Dark Blue wire) on headlight time delay relay socket. If resistance is less than 5 ohms, repair short to ground in Red/Dark Blue wire. If resistance is 5 ohms or greater, replace headlight time delay relay.
- If parking lamps go out, replace BCM. If parking lamps do not go out, remove parking lamp relay. Parking lamp relay is located behind dash, below parking lamp switch. If parking lamps do not go out, repair short to battery voltage in Black/Yellow wires. If parking lamps go out, go to next step.
- Using scan tool in ohmmeter mode, measure resistance at terminal "A" (Light Blue wire) on parking lamp relay socket. If resistance is less than 5 ohms, repair short to ground in Light Blue wire. If resistance is 5 ohms or greater, replace parking lamp relay.