Question about 1996 Pontiac Firebird

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Firebird tail lights

In my 1996 firebird, my brakes work if my headlights are off, but when I turn on my headlights my brake lights and turn signals stop working. What might be the problem? How is it fixed?

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It is a ground problem. When you turn on your headlights, they are sharing the same ground that your brake and T/S lights are using. Check all ground connections to the body from all headlight and taillight wiring are connected and tight. If it doesn't affect your taillights, it may be in your T/S switch. Check your ground connections first.

Posted on Mar 18, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: brake lights not working

check brake light switch

Posted on Sep 13, 2008

  • 2 Answers

SOURCE: Brake lights will not illuminate when brake is pressed.

I would test the brake light switch. maybe its bad

Posted on Jul 02, 2009

MNfisherman
  • 11896 Answers

SOURCE: Tail lights not working on 2005 Pontiac Pursuit

Either there is a short from switch to relay to lights or the bulbs are shot or sockets have the short

Posted on Jul 09, 2009

joecoolvette
  • 5660 Answers

SOURCE: my turn signal lights wont work on my 95 firebird formula

Go under the dash on the drivers side, and locate the two flasher stat units. These are small round aluminum 'cans'. They plug in, and have flat blades on the bottom. (You of course won't see these flat terminal blades until you unplug them)

One is for the turn signals. One is for the four way flashers. I can't tell you which one is which.

Past this point, check all the grounds for the turn signals. The wiring harness at the front will have one, or two leads, (Wires), coming out that bolt directly to metal. Either sheet metal for the car, or to the frame. These leads have flat, round terminal ends on them, with a hole in the middle of the terminal.

The lead's terminal end bolts can work loose causing a bad ground, and/or, there could be corrosion in-between the terminal end, and the area of metal it bolts to. If so, use sandpaper, and clean the terminal end, plus the area of metal it bolts to.

There are ground leads, (Or lead), that come out of the rear wiring harness also. Check these.

Still no?
Then your turn signal bulb sockets have corrosion in them. This causes a bad ground.

You may be able to use a rolled up piece of sandpaper, and clean the socket.
(Also touch up the lead, {LED. As in the metal lead}, contact point in the middle of the socket. This is for the Positive connection, but it doesn't hurt to clean it while you're there.

After this is the turn signal switch in the steering column.
(My money is on a bad flasher unit)

Posted on Jul 14, 2009

  • 10865 Answers

SOURCE: Tail lights don't work, but brake, flash and hazzard work.

generally when the fuse is ok and the bulb is ok the problem is corrosion of the ground wire and connection to the frame, or corrosion in the bulb sockets. for starters go to any auto parts store and get an aerosol can of contact cleaner especially for auto bulbs and connections.

Posted on Aug 28, 2009

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