brake light problem
Thread Starter
7th Gear
Joined: Jul 2007
Posts: 7
Likes: 0
From: Green Bay Wisconsin
brake light problem
I just joined the forum recently. I have a magnetic red 2002 convertible. My problem is that I have no brake lights on the right side. The taillights and signals work but no brake lights or four-way flashers on the right side. Any help would be appreciated.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
If it was dead bulbs you'd have rapid flashing.
Looking at the wiring diagram, the turn signals, the license lamp and the side marker lamps are all on the same circuit. The wires route through a connector in the rear passenger side wheel well. You can get to it from under the car. Check that's connected properly and maybe clean it up and reseat it. If only the turn signals on one side have stopped I'd look at the lamp units themselves and the grounds for those lamps. Maybe loose or needing cleaning? Its a brown hot wire and black to ground.
Looking at the wiring diagram, the turn signals, the license lamp and the side marker lamps are all on the same circuit. The wires route through a connector in the rear passenger side wheel well. You can get to it from under the car. Check that's connected properly and maybe clean it up and reseat it. If only the turn signals on one side have stopped I'd look at the lamp units themselves and the grounds for those lamps. Maybe loose or needing cleaning? Its a brown hot wire and black to ground.
Last edited by DeeGee; Jul 9, 2007 at 07:41 AM.
Uneducated autodidact
Joined: Feb 2001
Posts: 5,411
Likes: 252
From: West of the Sabine, Texas
A common cause for these symptoms is either the hazard switch (known issue on C5s) or the turn signal stalk (also a known issue). I had to replace the turn signal stalk on the columnm due to corrosion inside. I'd bet on one of those two as the root cause of your problems....
Team Owner
Joined: Jul 2006
Posts: 22,152
Likes: 4,165
From: Kannapolis NC
If it was dead bulbs you'd have rapid flashing.
Looking at the wiring diagram, the turn signals, the license lamp and the side marker lamps are all on the same circuit. The wires route through a connector in the rear passenger side wheel well. You can get to it from under the car. Check that's connected properly and maybe clean it up and reseat it. If only the turn signals on one side have stopped I'd look at the lamp units themselves and the grounds for those lamps. Maybe loose or needing cleaning? Its a brown hot wire and black to ground.
Looking at the wiring diagram, the turn signals, the license lamp and the side marker lamps are all on the same circuit. The wires route through a connector in the rear passenger side wheel well. You can get to it from under the car. Check that's connected properly and maybe clean it up and reseat it. If only the turn signals on one side have stopped I'd look at the lamp units themselves and the grounds for those lamps. Maybe loose or needing cleaning? Its a brown hot wire and black to ground.
