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Old 08-12-2017, 09:45 AM
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Larry Jackson
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Default ECM Question

can I bypass the ecm and use a standalone fan switch on a 1989 vette.
Old 08-12-2017, 10:55 AM
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MikeP84
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I dont see why not. You can have the fan on whenever key is on buy just grounding the relay
Old 08-13-2017, 09:01 AM
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ThomasRetUSN
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I put in a manual fan switch on my 86 several years ago. I have no problems at all. I can turn on my fan any time I want.
Old 08-14-2017, 09:48 PM
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gjohnson
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Just ground out the fan like said above and it will come on when the keys on. I did that on my 84 for summer driving then unground it for winter driving
Old 08-15-2017, 12:59 AM
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v8vette84
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They sell radiator fan control kits at advance auto. (They used to be in stock on the shelves) It uses a rheostat and a probe that gets stuck into the radiator fins. Turns on and off at the set temperature. I used to use one on my old 89' Camaro. Seemed to work ok, WAY better than a stupid manual switch. (which I used for maybe a season prior to getting this kit) The problem I had was the car would always overheat when I let someone drive the car as I would forget to tell them to turn the switch on for the fan.

Last edited by v8vette84; 08-15-2017 at 01:00 AM.
Old 08-15-2017, 08:34 AM
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Larry Jackson
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Default Fan switch

Originally Posted by v8vette84
They sell radiator fan control kits at advance auto. (They used to be in stock on the shelves) It uses a rheostat and a probe that gets stuck into the radiator fins. Turns on and off at the set temperature. I used to use one on my old 89' Camaro. Seemed to work ok, WAY better than a stupid manual switch. (which I used for maybe a season prior to getting this kit) The problem I had was the car would always overheat when I let someone drive the car as I would forget to tell them to turn the switch on for the fan.

That is what I intend to do. Thank you.

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