DRL problem
Thread Starter
Racer
Joined: Feb 2009
Posts: 273
Likes: 0
From: Dallas, TX
DRL problem
This is how my car looks after being at work for a couple of hours this morning. The taillights are also illuminated.
DRL's won't turn off. Went for a drive thinking it might just be a crazy glitch and it would reset after. No luck. Also noticed that when rotating the light switch forward to turn off DRL's, the green light in the instrument cluster that says the DRL's are on, doesn't turn off. I ended up pulling the relay under the hood just to shut off the lights.
Suggestions on what might be causing the problem?
Daytime Running Light sensor on dash?
E-Brake switch?
BCM?
DRL's won't turn off. Went for a drive thinking it might just be a crazy glitch and it would reset after. No luck. Also noticed that when rotating the light switch forward to turn off DRL's, the green light in the instrument cluster that says the DRL's are on, doesn't turn off. I ended up pulling the relay under the hood just to shut off the lights.
Suggestions on what might be causing the problem?
Daytime Running Light sensor on dash?
E-Brake switch?
BCM?
Melting Slicks
Joined: Sep 2009
Posts: 2,028
Likes: 357
The green light on the dash indicates the headlights are on. The other green light indicates the fogs are on. If under warranty, I'd take it to dealer, the BCM (body control module) is probably going bad.
make sure you don't have anything covering the light sensor on the dash.
Even if you turn the lights on manually, they should shut off after 15 minutes. If thier not, the BCM is probably malfunctioning.
Might be the DRL relays, but I don't see why the brake or running lights would be on as well.
Good luck,
make sure you don't have anything covering the light sensor on the dash.
Even if you turn the lights on manually, they should shut off after 15 minutes. If thier not, the BCM is probably malfunctioning.
Might be the DRL relays, but I don't see why the brake or running lights would be on as well.
Good luck,
Last edited by CGZO6; May 12, 2011 at 10:36 AM.
Le Mans Master
Joined: Dec 2004
Posts: 5,491
Likes: 806
From: West coast CA
I'd start by checking for a short to ground on the BCM side of the park lamp relay.
Thread Starter
Racer
Joined: Feb 2009
Posts: 273
Likes: 0
From: Dallas, TX
Tested the DRL running light sensor on the dash by covering it up. The headlights came on, then I manually turned off all the lights, and the "Headlamps Suggested" message popped up. So I don't think it's the DRL sensor.
Also, by manually turning off all the lights, the "parking light" symbol on the cluster stays lit up and the parking lights are still on. Only way to turn them off is by pulling the relay.
Also, by manually turning off all the lights, the "parking light" symbol on the cluster stays lit up and the parking lights are still on. Only way to turn them off is by pulling the relay.
Pro
Joined: Mar 2003
Posts: 708
Likes: 66
From: New Franklin, OH
Tested the DRL running light sensor on the dash by covering it up. The headlights came on, then I manually turned off all the lights, and the "Headlamps Suggested" message popped up. So I don't think it's the DRL sensor.
Also, by manually turning off all the lights, the "parking light" symbol on the cluster stays lit up and the parking lights are still on. Only way to turn them off is by pulling the relay.
Also, by manually turning off all the lights, the "parking light" symbol on the cluster stays lit up and the parking lights are still on. Only way to turn them off is by pulling the relay.
The other thing to check is whetehr the relay is clicking when you try to turn the lights off, at least you know which side of the relay the issue is.
Sonny
Thread Starter
Racer
Joined: Feb 2009
Posts: 273
Likes: 0
From: Dallas, TX
Yeah I swapped the relays and that didn't help.
Went by a friends at lunch and he was able to get them to turn off. He held the switch for turning the lights off back for 10-15 secs. Lights went off and never came back on. I had tried multiple times to switch them off from the same place, but didn't hold it nearly as long as he did.
Something weird is going on.
I hate electrical gremlins.
Went by a friends at lunch and he was able to get them to turn off. He held the switch for turning the lights off back for 10-15 secs. Lights went off and never came back on. I had tried multiple times to switch them off from the same place, but didn't hold it nearly as long as he did.
Something weird is going on.
I hate electrical gremlins.
Instructor
Joined: Nov 2009
Posts: 141
Likes: 0
From: Huntsville Alabama
Yeah I swapped the relays and that didn't help.
Went by a friends at lunch and he was able to get them to turn off. He held the switch for turning the lights off back for 10-15 secs. Lights went off and never came back on. I had tried multiple times to switch them off from the same place, but didn't hold it nearly as long as he did.
Something weird is going on. I hate electrical gremlins.
Went by a friends at lunch and he was able to get them to turn off. He held the switch for turning the lights off back for 10-15 secs. Lights went off and never came back on. I had tried multiple times to switch them off from the same place, but didn't hold it nearly as long as he did.
Something weird is going on.
I hate electrical gremlins.Good luck.
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Pro
Joined: Jun 2005
Posts: 693
Likes: 2
From: Los Angeles CA
my taillights would stay on after a BCM replacement before.
had to take back to dealer and have them correct it somehow.
but not sure why yours would suddenly do it without the BCM ever being touched...
had to take back to dealer and have them correct it somehow.
but not sure why yours would suddenly do it without the BCM ever being touched...
