Question about 1989 GMC Suburban

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Tail lights pulse on 89 suburban. it gets worse when left turn signal is applied

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  • GMC Master
  • 3,103 Answers

They dont blink they just get bright and dim? may have a shorted bulb filament check the side that flashes funny..

Posted on Dec 30, 2013

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Posted on Jan 02, 2017

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motor1258
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SOURCE: 96 suburban steering wheel pulls to left when breakes are applied

Sounds ridiculous maybe, but have you by any chance tried braking hard, at lower speed on a gravel road, just to see if you can pick up on which wheel is grabbing first. I recall a rear wheel cylinder partially seized with slight leak on rear of one of my vehicles, causing front end to whip over on braking. Only after hitting them hard at slower speed on gravel road, was I able to pick up on it.

Posted on Feb 19, 2009

cabrooksjr
  • 13 Answers

SOURCE: 93 GMC Suburban, No Tail Lights

Check the trailer plug ground first. If in doubt. Ground in another location. Make sure the area is free of rust and the ground is tight.

Posted on Jun 28, 2009

  • 12 Answers

SOURCE: 1999 GMC Suburban, K1500 4WD. Top brake light bar

third light is different circuit. saftey reason check fuses grounds wires

Posted on Oct 11, 2009

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1 Answer

I'm needing the wiring diagram for my 2007 Chevrolet Impala LT 3.5 tail lights.


Go to http://www.bbbind.com/free_tsb.html free wiring diagrams ! You having tail light problems ? Do you know how they work ?

They are turned on by the BCM !
Park, Tail, Marker and License Lamps
The park, tail, license, and marker lamps are turned ON when the headlamp switch is placed in either the HEAD or PARK lamp positions, or anytime the automatic light control (ALC) turns the headlamps ON. When the headlamp switch is placed in the park lamp or headlamp positions, ground from G202 is applied through the signal circuit to the BCM indicating the park lamp request. In response to this signal, the BCM applies ground through the park lamp relay control circuit energizing the PARK LP PCB Relay. With the relay energized, battery voltage is applied through the switch side of the relay, both park lamp fuses, and the supply voltage circuits illuminating the park, tail marker, and license lamps. Ground for the left front park and marker lamps is provided at G101 and the right front park and marker lamps at G100. Ground for all rear lamps is provided at G302.
Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
?€¢
G101 provides ground for the left front turn signal lamp


?€¢
G100 provides ground for the right front turn signal lamp


?€¢
G302 provides ground for the left and right rear turn signal lamps

May 03, 2016 | 2007 Chevrolet Chevrolet Impala LT

1 Answer

How do i replace left rear brake light bulb


1) Open trunk
2) Remove small round plastic access panel with a flat tip screw driver by prying open
3) Remove flat tip screw holding tail light assembly
4) Remove tail light assembly by pulling outward, careful not to break plastic guide/nub
5) Disconnect wiring connectors
6) Remove plastic housing access plate on back of tail light assembly by twisting/turning tabs until they click and then lift access plate from tail light assembly
7) When viewing the the bulbs, the turn signal bulb is the bottom left bulb
8) Install in reverse order, ensuring tail light seal seats properly during installation

Oct 13, 2014 | 1999 Audi A4

1 Answer

2005 Suburban brake signal light issue


Sounds like a faulty turn signal switch. The brake light wire is routed through the turn switch, so it appears the turn switch has gone crazy.

Dec 27, 2013 | 2005 Chevrolet Suburban 1500

2 Answers

I have 89 bronco 2 my brake lights turn signals both work my tail lights don't work have check fuse n blubs what might be the problem


The turn signals and brake lights use the same circuit and filament in the bulbs. The tail lights are on the other circuit which comes from the headlight switch.
Do you have power on the tail light fuse ?

Feb 25, 2013 | 1987 Ford Bronco II

1 Answer

I'm trying to wire my 89 jeep wrangler to be towed useing it's existing lights.the turn signals both flash when right or left is on? I've tryed it under the dash with no luck now all the way...


If the brake and turn signal are on the same bulb than you can Orin straight wiring. If the brake and turn signal are on different bulbs than you'll need a wiring harness with a converter box. I'm pretty sure the wrangler has the brake and turn signal on the Same bulb so let's start with basic trailer wiring. The green wire on the trailer harness is for the right side turn and brake for the trailer. This wire should be attached to the wire on the vehicle that supplies power to the right turn signal/ brake light. The yellow wire is the left turn signal, brake light on the trailer and should be attached to the wire on the vehicle that supplies power to the left turn signal /brake light. The brown wire is the tail lights on the trailer and should be attached to either the left or right side wire on the vehicle that supplies power to the tail lights. The white wire is grounD and it is vitally important that this wire be attached to the vehicle in a manor that supplies a good ground. Failure to suppy a good ground will result in all kinds of funky problems with the trailerer lighting such as all the lights linking when the tail lights and turn signals are on at the same time. If you have any specific questions I will be more than happy to try and help. Good luck.

Jun 29, 2011 | Jeep Wrangler Cars & Trucks

2 Answers

How to replace tail light 1996 Suburban


Hello,
I changed the tail lights of my wife's suburban which is the same as yours some few weeks ago,here is how i did it myself,although i'm a mechanic but its not technical;

STEP1. Two screws inside the tail gate jam.
STEP 2. Pry with fingers or something that won't scratch the paint the tail light out (Forward). try not to break anything

STEP 3. Good thing is the bulbs are interchangeable an they have multiple filaments in them. I was able to swap mine around for some bulbs with unused filaments.

STEP 4 Check all lights after replacement of course. Don't want to make your brake lights work and then your turn signal not work.
Problem solved.

Thanks for using fixya,have a nice day.

Dec 19, 2010 | 1996 Chevrolet Suburban

1 Answer

Jaguar xj6 break light cancels signal


Replace the turn signal switch. Bad contact inside causing a crossing of the circuits. When the turn signal is applied it should open the brake light circuit allowing for just the signal to work. Doesn't sound like the switch is doing it's job.

May 23, 2010 | 1989 Jaguar Vanden Plas

1 Answer

93 GMC Suburban, No Tail Lights


Check the trailer plug ground first. If in doubt. Ground in another location. Make sure the area is free of rust and the ground is tight.

May 10, 2009 | 1993 GMC Suburban

1 Answer

89 Ford Thunderbird, tail lights done' work


An 89, that old enough that oxidation could be a problem.
I'd start by separating all the connectors you can get to, unfortunately there may be one over the gas tank. You can take a light and see if there is one by having someone pull and release the tail light wire as you look.
Thoroughly clean each end of the connector until you can see a little copper show. If it looks like there was grease on the connector, apply some dielectric grease before you reconnect the wires.

Jan 08, 2009 | 1989 Ford Thunderbird

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