Question about 2001 Chevrolet Blazer

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Left turn signal flashes fast but bulbs ok

I have a 2001 Blazer and the left tail light blinds fast, the right side is fine. When doing a 4 way light check the signals are all ok, I looked at the light bulbs and replaced them but it still does it. Any idea were this problem might be? is this a ground wire issue? if so, were is the ground located? or would this be a relay?
I do have a trailer wire but thought it was at the connection, replaced that and nothing changed. It the trailer wire is a problem on these, how far back do most have to go were the problem is?

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  • Chevrolet Master
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Its either the earth or the wrong wattage bulbs ?? they should be 21 watts

Posted on May 16, 2010

  • rjfox12 May 16, 2010

    Thanks but I found the problem, it was never one, I doubt it would be the wrong bulb when you match it when you change it out, second, this was a problem before I change the bulb out. If it was an earth and I question if, then were would it be ?
    The problem is the Flasher relay, it is an electronic flasher that has a curcuit board in it. When I opened it I saw it had a flash burn in it so knew it was gone, replaced it and everything works good.
    I actually work in the Auto R

  • Colin Stickland
    Colin Stickland May 17, 2010

    unusual but possible if it has a trailor connection and a towbar ,the extra load or a short in the light board of the trailor would cause this sort of thing ,when i do wire up a towbar fitment i always use a couple of relays and make a nice litle board up with some relays so i have one for all the lights using a fused supply as it stops the lights from dimming when towing ,But i am an old commercial fleet fitter but here in spain only an authorised company can fit towbars with all the paperwork ,but i still get to repair quite a few from the builders must go first customer arrived

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