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Thread: 1997 GMC 1500 - new heater blower not working

  1. #1
    Senior Member PickUpGirl787's Avatar
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    1997 GMC 1500 - new heater blower not working

    I have a couple of questions for ya. I put a new blower motor
    in my truck thinking that it would fix the squealing noise it made,
    after i put it all back together I turned it on and got nothing.

    Took the test light to it and found that there was power to it and everything,
    I'm thinking it could be the switch, because I have had some problems
    with that too. staying on after I turned the truck off etc...

    does anyone have any ideas and should I get a new switch from the junkyard
    or should I call up Napa and just get a new one?
    Last edited by crabtruck; 05-03-2011 at 12:35 AM. Reason: title
    Ashley

    My first truck was a 1988 Chevy 1500 with the 305
    My new truck is a 1997 GMC 1500 with the 350

  2. #2
    Senior Member
    75K30's Avatar
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    If you have voltage like you stated, then the switch is not the problem.
    Did you verify that the motor worked prior to the install?

  3. #3
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    If you change the swithc, I believe that I have seen the switch at the "help" section in Auterzone......

    But your switch may not be the problem if you have juice at the fan.

  4. #4
    Senior Member 03chevy's Avatar
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    make sure you didn't blow a fuse too.
    A dirty mind is a terrible thing to waste!

  5. #5
    Senior Member PickUpGirl787's Avatar
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    fuse is ok. ill look again maybe ill take it all apart and put it all back together, gives me something to do
    Ashley

    My first truck was a 1988 Chevy 1500 with the 305
    My new truck is a 1997 GMC 1500 with the 350

  6. #6
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    Shoot if you have that much time to waste feel free to work on my truck anytime. I always have something new to work on. I would make sure the blower works. It might of been bad when you put it in.

  7. #7
    Senior Member PickUpGirl787's Avatar
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    I have no school this week so im really bored, Trying to pick up extra shifts at work but in the mean time its me and the remote watching lifetime movies or freezing outside working on the stupid heater
    Ashley

    My first truck was a 1988 Chevy 1500 with the 305
    My new truck is a 1997 GMC 1500 with the 350

  8. #8
    Senior Member
    crabtruck's Avatar
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    Remember Ash, hot is only one side of circuit, check your ground path is good.
    Before pulling the blower, you could try a couple other things.
    With it all hooked up, key on, eng off, see if batteery voltage drops when you turn on fan.
    If it does, your connections are good.
    If not, may be connections, but disconnect the hot (& key out)
    and ohm the blower hot (wire from motor, not switch) to ground.
    If nothing, ohm across the blower itself.
    If good, try jumping the disconnected blower wires straight to the battery for a second.
    Good practices says use a fused wire to do the jump.
    If ohming across the blower by itself shows its open, the blower is bad.

  9. #9
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    Sounds like you got a short somewhere. Make sure your ground wire is attached. Any rust or paint where the wire goes means you aint got a good ground.

  10. #10
    Senior Member silverhairdeere's Avatar
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    depending on on the year or if it has airconditing , i believe there is a resistor that controls the motor speeds

    silver hair deere

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