Taillights wont light up..Help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jesse977 · 10-26-2004, 04:28 AM

Both of my rear taillights wont light up. I checked the bulbs,flashers, and fuses and they are fine. When I put my hazard lights they will flash. I dont know whats wrong. I switched the bed on my truck, I have a 74 GMC and put on a 78-79 bed. Any help or advice would be appreciated, Thanks.

Russell · 10-26-2004, 09:24 AM

Check your brake switch, mine did that to me outta the blue last night, just pulled the switch out and put it back in, then it worked, lol

mhicks · 10-26-2004, 09:49 AM

Check the plug under the bed near the back bumper.

piecesparts · 10-26-2004, 09:22 PM

There may be a ground issue at this time. Put a jumper wire on the body of one of your lights and then connect it to the frame, this could be a common thing in the back of the truck and the ground circuit is feeding back through of of the other circuits. The suggestion for checking the plug is an excellent one. This plug is a little different than some of the other trucks and it may need to be seated better to get a good connection.

jesse977 · 10-27-2004, 04:15 AM

Quote:

Originally Posted by Russell

Check your brake switch, mine did that to me outta the blue last night, just pulled the switch out and put it back in, then it worked, lol

Brake switch??? Where is it??

bigblock73 · 10-27-2004, 12:39 PM

Quote:

Originally Posted by jesse977

Brake switch??? Where is it??

Under the dash...your brake pedal arm pushes against it. When the switch is not in contact with the pedal, your brake lights should turn on...when they make contact, they should go out.

jesse977 · 10-28-2004, 02:38 AM

Quote:

Originally Posted by bigblock73

Under the dash...your brake pedal arm pushes against it. When the switch is not in contact with the pedal, your brake lights should turn on...when they make contact, they should go out.

Thanks, Im gonna check it.

10-26-2004, 04:28 AM	#1
jesse977 Registered User Join Date: Jun 2004 Location: Los Angeles Posts: 277	Taillights wont light up..Help! Both of my rear taillights wont light up. I checked the bulbs,flashers, and fuses and they are fine. When I put my hazard lights they will flash. I dont know whats wrong. I switched the bed on my truck, I have a 74 GMC and put on a 78-79 bed. Any help or advice would be appreciated, Thanks. Last edited by jesse977; 10-26-2004 at 04:30 AM.

10-26-2004, 09:24 AM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Check your brake switch, mine did that to me outta the blue last night, just pulled the switch out and put it back in, then it worked, lol __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

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10-26-2004, 09:49 AM	#3
mhicks Registered User Join Date: Jan 2004 Location: Weatherford,Tx Posts: 747	Check the plug under the bed near the back bumper.

10-26-2004, 09:22 PM	#4
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	There may be a ground issue at this time. Put a jumper wire on the body of one of your lights and then connect it to the frame, this could be a common thing in the back of the truck and the ground circuit is feeding back through of of the other circuits. The suggestion for checking the plug is an excellent one. This plug is a little different than some of the other trucks and it may need to be seated better to get a good connection.



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