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  1. #1
    Jr. Apprentice
    Join Date
    Oct 2007
    Columbus, Ohio

    Default Blower Motor Resistor Problems

    I have a 2005 Trailblazer ext 4x4. My blower motor resistor went out and I went to replace, but found that the main wire harness with 7 wires 2 of them the black and red were burned and melted the harness a little. What should I look for next, were should I look. I think It might be a loose ground or bad wire some were else that caused the problem. I don't really want to take it to a dealer. I have always worked on my own cars, but electrical is tricky!

  2. #2
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    High Deserts of SoCal


    Do you have the right size fuse in the panel? Fuse should blow before wires burn. Have you replaced the fan motor yet? A motor that is drawing too much current could be trouble.
    There is no way to happiness....happiness is the way.:yipi:  _vXMYypuKMJFw671uF2ZPhjez_j-atRmcjM2zQKpQi1JSsB75/burb1.JPG
    High Desert SoCal
    93 K1500 burb (personal) 350 AT 3" Lift 250K+
    02 Honda Civic LX
    Looking for a 1990's Miata for an engine swap

  3. #3
    Jr. Apprentice
    Join Date
    Oct 2007
    Columbus, Ohio


    I found the problem was a loose wire harness, I pushed it in tight and it worked but when on speed 5 the wire gets so hot that it melts the harness. Does that mean my blower motor is pulling too many amps? I also found that the black and red wire were cut and replaced with a thinner wire. I know that could be a problem. Looks like somebody had a similar problem before i bought the truck. I plan on buying a new blower motor, replace the wire's with the right thickness, and replace the harness. Does that sound right? I can use speeds 1-3 for now until i get everything.
    2005 Chevy Trailblazer Ext 4x4
    2004 Chevy Cavalier
    1995 Chevy s-10 (sold)
    1989 Chevy s-10 (scrap)

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