NEED HELP - weird tail light/brake light/blinker light/hazzard light problem

Asked by Jul 10, 2011 at 08:19 PM about the 1999 Chevrolet Tahoe

Question type: Maintenance & Repair

I have a '99 Tahoe with a bizarre blinker/brake/tail light issue.

From the beginning:
Fast flash on the right blinker: replaced all bulbs on right rear side - no results. Replaced light assembly on right side & blinker bulb (only) on left side.

Worked perfectly for 3 blocks & problem began again only worse. Turn on the right blinker and the left blinker flashed. Turn on the left blinker and the right side flashed as well as the left side of the license plate. Turn on the head lights and all rear functioning lights become alarmingly dim.

hit the breaks and the turn signal and rear hazard lights come on.

I had recently used my trailer light connector. Years ago it was problematic so I removed it, taped off the ends & double checked grounds.

Next: Replaced the flasher relay. All rear lights appeared to work as designed except fading ~badly~ when head lights were engaged. Tryied again and all worked perfectly and continued to work perfectly for about a month.

Then, while driving at night, I braked & signaled...got a fast flash again. Only this time - I have no tail lights, brake lights or reverse lights but blinkers (dimly) work.

Replaced flasher relay again...I now have brake lights but the flashers are wacked out again and if I turn on the headlights everything goes haywire again.

replaced the mulit function switch.  It lasted about 30 days and all problems started again, PLUS the horn stopped working.

tested all wiring to and from lighting assemblies- all good.

removed entire trailer light assempbly and all power up to that point is correct.

Have never blown a fuse

replaced the head light switch (with a used one) and all problems were the same except when pressing the brake the reverse lights came on.

Put the old one back in and back to all the other problems (sans reverse lights).

In between getting the multi function switch replaced and the problem reoccuring, battery had to be replaced and at the same time new tips were put on the cables.  

Me, and two mechanics are at a complete loss.

Any ideas?

2 Answers

70

I have essentially the same problem with a 2006 Tahoe. It has only been a day and I haven't replaced all the parts you have but the symptoms are idential. Did you ever figure it out?

7 out of 7 people think this is helpful.

Here's my similar scenario....If left blinker is on and I press the brakes the blinker slows and the brake lights are off, right blinker and brakes speeds up blinker timing and brakes are off. Daytime running lights on when brake pushed but brake lights off. when brake not engaged, brake lights are on. Cruise control engaged and will disengage when turn signal initiated. When vehicle in park and brake pedal pressed, hazards come on. When brake pedal pressed, side mirror blinker lights would come on. Found a shorted out bulb on the rear brake light and replaced it. Now I have the problem of turning on the blinker, which it will blink with the correct timing, but when the brake pedal is pressed, the blinker quits blinking and I get a squealing noise. I can hold the brake continuously and it will switch off and on between blinking and squealing. If you every figure out your problem, I would LOVE to know the answer.

Your Answer

Add photo

Related Questions

Search Chevrolet Tahoe Questions

Chevrolet Tahoe Experts

#1 FordNut
FordNut
Reputation 770
#2 Tom Demyan
Tom Demyan
Reputation 670
#3 Rowefast
Rowefast
Reputation 550
View All

Related Models For Sale

Used GMC Yukon
499 Great Deals out of 16,963 listings starting at $1,777
Used Chevrolet Suburban
640 Great Deals out of 21,049 listings starting at $2,095
Used Cadillac Escalade
338 Great Deals out of 10,629 listings starting at $1,800
Used Chevrolet Silverado 1500
2,473 Great Deals out of 145,720 listings starting at $1,800
Used Ford Expedition
566 Great Deals out of 21,931 listings starting at $1,100
Used Ford Explorer
1,351 Great Deals out of 70,735 listings starting at $985
Used Ford F-150
3,138 Great Deals out of 200,440 listings starting at $1,273
Used Toyota 4Runner
352 Great Deals out of 19,442 listings starting at $2,995
Used Jeep Grand Cherokee
1,035 Great Deals out of 67,483 listings starting at $495
Used Dodge Durango
430 Great Deals out of 22,383 listings starting at $1,100
Used GMC Yukon XL
366 Great Deals out of 12,680 listings starting at $2,550
Used GMC Sierra 1500
1,084 Great Deals out of 56,556 listings starting at $1,600

Used Cars For Sale

2017 Chevrolet Tahoe For Sale
6,284 listings starting at $34,332
2016 Chevrolet Tahoe For Sale
85 Great Deals out of 6,766 listings starting at $31,201
2015 Chevrolet Tahoe For Sale
172 Great Deals out of 3,348 listings starting at $29,500
2014 Chevrolet Tahoe For Sale
41 Great Deals out of 781 listings starting at $13,999
2013 Chevrolet Tahoe For Sale
122 Great Deals out of 2,074 listings starting at $12,950