72 centurion fan only on high

Discussion in 'The Big Chill' started by nekkidhillbilly, Jul 1, 2023.

  1. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    so the fan only works on high. Im guess the resistor is bad. Question is where is that on this car. Ive looked online with out any info really. Few things on the blower motor housing but idk whats what.
     
  2. TrunkMonkey

    TrunkMonkey Totally bananas

    Heater box on top, passenger side (under dash) just to the right of the centerline of the car, there is a plug' The resister has to small sheet metal screws holding the resistor in place. Take the two screws out and lift the resistor out. It looks like coils (toaster wire) on a circuit board.

    Like this.

    upload_2023-7-1_20-31-22.png
     
    Max Damage and pbr400 like this.
  3. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    Pretty easy to get too?
     
  4. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I don't have one here to look at, but I think the resistor might be on the outer AC box. If it was non AC, it would be inside.
     
    GSX 554 likes this.
  5. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    Yes, the location is different between AC and non-AC
     
  6. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    its a ac car there is a couple of things that look like resistors on the outside box. im not sure whats what on these. Does anyone have like a service manual that can get me a pic and or a part number? thanks guys.
     
  7. CJay

    CJay Supercar owner Staff Member

    I'd look at the blower relay first. Mounted on the firewall
     
    Mark Demko and Max Damage like this.
  8. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    isnt that the same thing?
     
  9. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

  10. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    well it works great on high just wont do anything on lower speeds. so its kicking in. usually thats the resistor right?
     
    Max Damage likes this.
  11. DaWildcat

    DaWildcat Platinum Level Contributor

    That's my guess too, you'll just have to find it!

    Devon
     
  12. Brad Conley

    Brad Conley RIP Staff Member

    CENTURION RESISTOR.jpg

    The resistor you need to replace is the dark red square thing mounted on the AC Box.
     
    DaWildcat likes this.
  13. CJay

    CJay Supercar owner Staff Member

    I'm still betting its the relay....
     
  14. CJay

    CJay Supercar owner Staff Member

    What the relay looks like

    20230710_171318.jpg
     
  15. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    ill check both. i thought that was my resistor just wasnt a 100%. gotta replace heater core so im going to film it all.
     

Share This Page