Question about 1990 Buick LeSabre

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Turn signals stopped working on my car

I have a 1990 Buick LeSabre. About three months ago I had to start turning off my left signal as it wasn't turning off on its own anymore. Tonight, both turn signals quit working. Any ideas what caused them to stop working and how I would go about fixing it? Is it something I can fix easily on my own? Your help would be greatly appreciated as I am traveling out of town this weekend. Thank you!!!!

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  • rpbeatty May 28, 2009

    I checked the fuse and that seems ok. The brights still work as well as the windshield wipers.

  • rpbeatty May 28, 2009

    The turn signal lamps do not come on anymore.

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Sounds like you have a faulty turn signal switch. in your car the same lever can control lots of things, turn signals, bright headlights, flash to pass, not sure that's all, maybe the wipers too. so gm calls that thing a multifunction switch. can you change it yourself? maybe. will it be easy? depends on what else you have done. you have to take the steering wheel apart to get to it. i think your car is new enough to have airbags, so you have to deal with that. if you are still interested in doing it yourself i can give you a play by play, just trying to let you know you do run the risk of deploying the airbag so you need to decide if you think it's worth it.

Posted on May 28, 2009

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There is a flasher relay in fuse box

Posted on May 28, 2009

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The steering wheel must be removed to replace the canceling cam; this requires a special steering wheel removal tool.
If your lamps still light when you hold the turnsignal arm down; replace your flasher

Posted on May 28, 2009

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CHECK YOUR TURN SIGNAL FLASHER AN FUSE ON THE FUSE PANEL LOCATION.

Posted on May 28, 2009

  • fastnhonda May 28, 2009

    so you checked your turn signal relay? an is ok? check the fuse panel for location you may be able to swap that relay with another one an try see if anything works.

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1 Answer

Left turn signal doesn't flash.


there is a flasher under the dash put your 4 ways on and listen for the tick noise find the flasher unit under dash area driver side there is two one for the 4 ways and 1 for turn signals now that you have found them turn on working signal touch the flasher unit you will feel it pulse and hear the noise when you have the one pulseing on working signal this will need replacing can also be in fuse area have a good day

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A friend of mine restores cars and he said:

There are two different flashers.
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I think that your flasher is bad I believe that the 4-ways flasher is a seperate flasher unit it should be in the fuse box and look like the 4-way flasher , to find the flasher turn on the 4-ways and you can feel it or hear it flashing and lok for the flasher for the turn signals
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Have you tried replacing the flasher? They're typically round, and with the fuses under/in the dash. They probably cost 10-15 bucks, usually available at your local autoparts store.

Nov 24, 2008 | 1990 Buick LeSabre

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I had the same problem with my 89 Buick Le sabre. It turned out that I had to replace the computer. It was giving the wrong signals and cutting off the fuel. My engine light came on each time it happened. Since the computer was changed it has run like a charm. It cost about $500.
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