Reverse lights don't come on
Thread Starter
Pro
Joined: Mar 2001
Posts: 745
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From: Elkridge MD
Reverse lights don't come on
When I put the car in Reverse the back-up lights don't light up. But if I hit the ulock on the FOB the back-up lights come on. Where should I start?
Thanks
[Modified by MVP, 4:16 PM 11/9/2001]
Thanks
[Modified by MVP, 4:16 PM 11/9/2001]
Pro
Joined: Aug 1999
Posts: 500
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Re: Reverse lights don't come on (MVP)
I just had mine repaired for that. When I get home I'll look up the parts they changed to fix it. If I remember they changed two switches. The first one wasn't bad. The second one fixed it. It might have been a switch in the transmission.
Team Owner
Joined: May 2001
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Re: Reverse lights don't come on (MVP)
Had the same problem last year. Dealer replaced back-up light switch that's mounted on the transmission. :)
Pro
Joined: Aug 1999
Posts: 500
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Re: Reverse lights don't come on (MVP)
Here's what my RO said.
Backup light high resis./relay open. Performed diagnosis of backup lights inop. OBD2 scan showed body code, trouble tree LED to replace relay. Replaced relay, backup lamps still inop. Further diagnosis showed a high resistance condition in the reverse switch in the trans, which sent a wrong signal to the BCM, preventing BCM from triggering ground for the backup lamp circuit. Replaced backup lamp switch on trans, tested.
Here are the parts.
14069600 Switch
12077866 Relay
Backup light high resis./relay open. Performed diagnosis of backup lights inop. OBD2 scan showed body code, trouble tree LED to replace relay. Replaced relay, backup lamps still inop. Further diagnosis showed a high resistance condition in the reverse switch in the trans, which sent a wrong signal to the BCM, preventing BCM from triggering ground for the backup lamp circuit. Replaced backup lamp switch on trans, tested.
Here are the parts.
14069600 Switch
12077866 Relay
