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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#94399 01/22/2006 10:21 PM | Joined: Aug 2005 Posts: 183 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2005 Posts: 183 | All of a sudden the rear lights stopped working. Where do I start looking for the problem? The running lights work fine. It was all working a few weeks ago. Any suggestions? | | |
#94400 01/23/2006 12:05 AM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | magnolia,
To get net on the problem, it's either electrical or mechanical. The brakes and turn signal are a single circuit. Are you saying you have taillights, but no brake lights or backup lights.
The backup lights are not connected directly to the brake circuit...unless they might share a common fuse. After checking fuses, I would crawl around under the truck and look for mechanical damage.
I am not sure the brake light circuit is fused. It is connected to the flasher, and it does go through a switch of some sort.
A inexpensive 12v tester is very handy for problems like this. Grab a wiring diagram for your year truck and see if there is any common denominator between these failed items.
Stuart | | |
#94401 01/23/2006 4:33 AM | Joined: Aug 2005 Posts: 183 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2005 Posts: 183 | Thanks atomarc. My father suggested we start at the simplest point and he was right. He checked the light bulbs. The same filament in both bulbs went at the same time. I was all ready and focused to find where there could be a break in the line. I still haven't figured out what's wrong with the reverse/backup lights yet. Later. | | |
#94402 01/23/2006 5:08 AM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | magnolia, Outstanding...isn't it funny how we overlook the obvious. Tell your father he is very wise!  Stuart | | |
#94403 01/23/2006 9:47 PM | Joined: May 2005 Posts: 70 Shop Shark | | Shop Shark Joined: May 2005 Posts: 70 | Check the bulbs. I had about a yard of gravel dropped all at once into the bed of my 1/2 ton by a big frontloader. All my rear lights quit working and I figured it broke a wire. Wrong! The impact of the load hitting all at once broke the filimants out of the brake and backup lights at the same time.
52Ted
illegitimi non carborundum
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