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Tail lights not working 94 Sonoma

Tiny
CHEVELLEGUY
  • MEMBER
  • 1994 GMC SONOMA
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 131,000 MILES
With my 94 sonoma my tail light burnt out but both my back up lights and my break lights work. Ive checked every fuse and replaced the bulbs and still nothing. Is there a relay or something else that could of burnt out to make my lights not work?
Monday, November 29th, 2010 AT 1:11 AM

7 Replies

Tiny
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  • 75,992 POSTS
If the tail light fuse is okay-the problem is coming from the headlamp switch assy-
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Monday, November 29th, 2010 AT 1:26 AM
Tiny
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Well I couldnt find a fuse that was just for the taillights. So would a test light work to see if the switch is going out? My head lights work when I turn on the switch
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Monday, November 29th, 2010 AT 3:15 AM
Tiny
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Check T/L CTSY 20amp in the I/P fuse block-and test the brown wire on the headlamp switch it should have power when you put the switch on
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Monday, November 29th, 2010 AT 4:00 AM
Tiny
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So what I need to do is keep the switch plugged in and take a test light and check the brown wire with the switch on? If there is not power to the brown wire what else is wrong. Ive check every fuse there is more then once and there all fine
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Monday, November 29th, 2010 AT 8:00 PM
Tiny
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If the switch is on and no power coming out at the brown wire the switch is defective
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Monday, November 29th, 2010 AT 8:46 PM
Tiny
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  • MEMBER
  • 4 POSTS
Ok so I checked the brown wire and it works so its not in the switch, So somewhere from the switch to the light the power is getting cut off. Is there a relay to the taillights? What could be between the switch and the lights that could cause the power lose?
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Monday, November 29th, 2010 AT 11:26 PM
Tiny
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There's no relay in between you have an open wire between the switch and bulb sockets
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Monday, November 29th, 2010 AT 11:30 PM

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