cooling fans

1988 CADILLAC DEVILLE
243,000 MILES • 4.3L • V8 • 2WD • AUTOMATIC
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STEVENSON BENNETT
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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
Sep 15, 2016 at 2:55 AM
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HMAC300
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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.
Sep 15, 2016 at 5:15 AM
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STEVENSON BENNETT
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thank you will check that out. What is the function intended?
Sep 15, 2016 at 7:32 AM
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HMAC300
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it turns the fans on and will slow or speed up if air conditioner is on.
Sep 15, 2016 at 8:39 AM
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STEVENSON BENNETT
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thank you. sure appreciate the help. Hopefully I can "play it forward" in some way.
Sep 15, 2016 at 9:44 AM
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STRAILER
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Please use 2CarPros anytime, we are here to help and tell a friend.

Best, Ken
Sep 17, 2016 at 3:56 PM
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STEVENSON BENNETT
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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..
Sep 18, 2016 at 8:57 AM
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STRAILER
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Glad we could get it fixed please use 2CarPros.com anytime we are here to help

Best, Ken
Sep 18, 2016 at 11:22 AM
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STEVENSON BENNETT
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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.
Sep 21, 2016 at 8:38 AM
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HMAC300
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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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Sep 21, 2016 at 9:27 AM
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