Question about 1995 GMC Sierra C1500

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'94 GMC C1500 --tail lamps/rear parking lamps not working

I just purchased a '94 C1500 and am trying to fix an issue with the rear tail lamps, which do not come on with the headlamps or parking lights (the license plate lamp also fails to come on). The brake lights operate fine, as do the turn signals, hazard lights, and reverse lights.

The first thought that came to mind was a blown fuse. When I checked the panel beneath the dash, I was surprised to see hardly any fuses in the block. The manual I have been using (Haynes manual #24065, Chev. & GMC pick-ups, '88-'98 all models, '99-'00 C/K Classic)) to diagnose the problem shows a picture of a panel very similar to this, so at present I'm assuming this is normal(?) This manual also mentions an 'underhood fuse relay center' which I haven't located.

Unable to locate a fuse (and considering that the other lights are working, which seem to run off the same fuse) I replaced the bulbs, and also the tail light circuit boards, which I've heard are prone to failure. The tail lamps are still not functioning.

I have not found any breaks in the wiring from the T connection at the rear of the truck up to the front. The ground also seems solid. Are there any other components which could have failed? Please help!

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  • zach May 01, 2013

    same problem w/ my 90 sierra, switch is good, fuse good, looked where trailer lights plug in, looks good, any help appreciated zjh1977@hotmail.com

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I am having the same problem. i don't think it's the switch since front parking lights work. Did you ever love this problem? i'd love to hear what you it was

Posted on Jan 17, 2010

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The switch where u turn the lights on is probably bad. If that works let me know or if u allready fixed the problem let me know what it was.

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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(https://postimg.org/image/bliasd1ut/)

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