Question about 1999 Chevrolet Tahoe

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I have a 99 Tahoe with headlight's off and D.R.L.s on my brake and turn signals all work correctly. When I turn the headlights on hit the left turn signal and all 3 bulbs flash dimly. All circuit boards and bulbs are new. I am going crazy trying to figure this out?

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It sounds like your headlight switch has a bad circuit.

Posted on Mar 03, 2019

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I would start with the trailer wiring if you have a tow package. Most wires are well protected from the factory, but teailer plug wires are after market and hang under the bumper. Very exposed.

Posted on Mar 03, 2019

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Shorted circuit some where. 1st check all the bulbs to see that they are not shorting in socket or in bulb. 2nd check wires running to lights for visual problems.

Posted on Mar 01, 2019

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Check your ground wired, The system is backfeeding.

Posted on Mar 01, 2019

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Posted on Jan 02, 2017

Buddy Altman

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SOURCE: turn signal

Go to your local NAPA auto parts store and get replacement tail lights circuit boards. This should solve the problem. I did for my daughters van.

Posted on Jan 17, 2009

Anonymous

  • 1118 Answers

SOURCE: Brake lights dont work, Turn Signals all goofy

First thing i would do is chg. the break light switch, and make sure to chk. all grounds around tailights, sometimes if there is a ground problem it will travel back thru the hot wire to get a ground, witch in turn makes everything go wackey.

Posted on Mar 10, 2009

Robert Debison

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SOURCE: 2002 ram 1500 single cab ext light issues

sounds like a faulty underhood fuseblock..have seen lighting issues with these components

Posted on Aug 02, 2009

Anonymous

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SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

Posted on Oct 11, 2009

wyet_helps

wyet

  • 510 Answers

SOURCE: brake lights don't work when

{: ) Looks like your lightings got haywired. Have you had vehicle repairs recently? Anyway, it seems that you have poor grounding connections for the affected lightings. Some circuits share common ground, and ground terminals are strategically distributed on the vehicle. If these grounds don't have good contact with the body, chassis, or engine ground, circuit functions are badly affected. Thats why these ground points should be inspected and kept clean and tight, maintain that good wire and terminal contacts.
We can start with G100 located at the Left Front of the Engine Compartment on the left front body mount. See diagram below:


wyet_helps_24.gif Check out also G401 which is located in the chassis harness, mounted to the left rear Body mount. This ground point is shared by the rear lamps like the brakes, reverse, and rear signal lamps.
If possible check also other ground points that you may visually come across while on your search. Be sure also that fuses are all inspected good.
I hope we get lucky in finding and fixing a certain lamp function, if not all. Goodluck.

Posted on Aug 10, 2011

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I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

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Brake lights dont work, Turn Signals all goofy


First thing i would do is chg. the break light switch, and make sure to chk. all grounds around tailights, sometimes if there is a ground problem it will travel back thru the hot wire to get a ground, witch in turn makes everything go wackey.

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