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heater fan

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by coolhandluke, Dec 13, 2001.

  1. coolhandluke

    coolhandluke 1/2 ton status

    Oct 23, 2001
    Likes Received:
    Dallas Texas
    My fan motor went out the other day, help me out, because I'm a complete moron when it comes to electricity.

    What could it be, and how do I test/fix it?

    I checked the fuses, there all good.

    my guesses are

    1. Switch is bad
    2. wiring to motor went bad
    3. motor itself

    how do I test all this?

    83 k5 originally diesel, now 350, 700-R4 12 bolt rear, 33x12.50 BFG Trails (yuck), desperately seeking a lift
    sometimes nothing is a real cool hand
  2. 95 Silverado

    95 Silverado 1/2 ton status

    Nov 9, 2001
    Likes Received:
    Central PA
    remove the wire from the heater fan motor, use a piece of wire from the pos. battery post to the motor connector, if the motor runs the problem is in the switch or wiring, if it doesn't run the motor is bad or it's not getting a good ground, some have a separate ground wire that is attached to one of the motor screws, if the ground is good, it must be the motor. remove the motor and make sure something didn't get inside the heater housing and lock-up the blower wheel to prevent it from turning.

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
  3. Steve#1

    Steve#1 Newbie

    Oct 9, 2000
    Likes Received:
    Plano TX
    I've got the same project planed for this weekend.
    Steve #1

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