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Cooling fans

Tiny
STEVENSON BENNETT
  • MEMBER
  • 1988 CADILLAC DEVILLE
  • 4.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 243,000 MILES
On the driver side cooling fan is a "resistor block" attached to the fan frame. Block has three prong plug. It is broke and I cannot find one. GM has discontinued. What is it? And is there a work around? Thanks
Thursday, September 15th, 2016 AT 9:55 AM

9 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Rock auto shows a controller which looks to be wired in to replace what you are talking about they have about four different ones and it will need to be adapted so if you are not okay with doing it a mechanic can. It will probably come with instructions on how to do it. They are in the $25.00 to $30.00 price range.
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Thursday, September 15th, 2016 AT 12:15 PM
Tiny
STEVENSON BENNETT
  • MEMBER
  • 5 POSTS
Thank you will check that out. What is the function intended?
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Thursday, September 15th, 2016 AT 2:32 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It turns the fans on and will slow or speed up if air conditioner is on.
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Thursday, September 15th, 2016 AT 3:39 PM
Tiny
STEVENSON BENNETT
  • MEMBER
  • 5 POSTS
Thank you. Sure appreciate the help. Hopefully I can "play it forward" in some way.
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Thursday, September 15th, 2016 AT 4:44 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Please use 2CarPros anytime, we are here to help and tell a friend.

Best, Ken
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Saturday, September 17th, 2016 AT 10:56 PM
Tiny
STEVENSON BENNETT
  • MEMBER
  • 5 POSTS
Found a used one on a old cutlas in salvage yard slightly different wiring but adaptable. Also small difference in ohms resistance. BUT IT works.
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Sunday, September 18th, 2016 AT 3:57 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Glad we could get it fixed please use 2CarPros. Com anytime we are here to help

Best, Ken
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Sunday, September 18th, 2016 AT 6:22 PM
Tiny
STEVENSON BENNETT
  • MEMBER
  • 5 POSTS
Hi Ken. Just a little more info if you have it available. Mounted to the fender liner under the hood drivers side are three relays on a bracket. The is another relay same part nr looks like mounted near the firewall on passenger side. Can I test them? And what do the control. Thanks again.
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Wednesday, September 21st, 2016 AT 3:38 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
We only show those three for buick and olds, but hel it may be yours as well they all control cooling fan theonly one on right firewall a/c compressor relay see pic
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
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Wednesday, September 21st, 2016 AT 4:27 PM

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