Question about 2004 Chevrolet TrailBlazer

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Left turn signal flashing fast, bulbs are OK, can't find the flasher unit

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  • Master
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You said lights are working fine on rear but generally when they flash fast there is a turn signal light out on the side they flash on. Did you look at the turn signal light on the front of the vehicle?

Posted on Jul 28, 2009

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Posted on Jan 02, 2017

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alicantecoli
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SOURCE: My 94 Golf right turn signal gives a fast flash.

more like the hazard switch ,but i would check the earth on the back light first

Posted on Aug 25, 2009

MNfisherman
  • 11896 Answers

SOURCE: Driver side rear signal light won't work , bulb is

Both bulbs have to be new. They can't be different ages. Change the flasher as well.

Posted on Aug 26, 2009

  • 1 Answer

SOURCE: 1987 toyota camry s/w back

Problem solved, Since 3 of the 4 turn signals worked I did not fuse was a problem
but after checking the turn swithch, I pulleded out the fuse which looked ok, but when
I put it back in all the turn signal lights woked! Apparently just one part of the surface
of the fuse was corroded.

Posted on Aug 05, 2008

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Easy way to find the location of the flasher unit: Turn on either the RIGHT or LEFT indicator, and listen for the click under the dash. When you find the source of the click, THERE'S THE FLASHER UNIT! :)

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Quite a puzzle you have that seems impossible, though such things weren't unusual in the old days of bimetal flasher units. The modern electronic flasher relay is designed to flash at a speed dependent on the amount of current drawn by the circuit so if a bulb goes out the speed doubles or thereabouts, giving the driver an indication something is wrong.
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My instinct is to suspect the hazard warning switch. It is often an unnecessarily complex switch and wiring arrangement and often responsible for turn signal malfunctions. Mostly operating the switch rapidly for a few minutes puts matters right, though if it doesn't I suggest you check the multiway connector behind the switch.

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