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07-18-2015, 02:44 PM
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#1 |
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Registered User
Join Date: Aug 2011
Location: Lakewood WA
Posts: 30
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1989 GMC s15 - radiator fan constantly running
When I start the truck ...it immediately starts to run and than runs until I turn off...I believe it should come on only when temp. is high enough or ac is on..
Before this happened I was trying to fix ac but now ac connected is not connected any more but still fan starts immediately I turn on the truck.. temperature sensor or anything else? Where is temperature sensor located that turns on that radiator fan? Last edited by vikasintl; 07-18-2015 at 02:54 PM. |
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07-19-2015, 06:02 PM
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#2 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,249
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Re: 1989 GMC s15 - radiator fan constantly running
I'm not sure of where they are with an S10/S15, but I'll move this to that area and maybe someone over there can help u out.
__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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07-19-2015, 07:05 PM
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#3 |
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Registered User
Join Date: Dec 2006
Location: SLC, UT
Posts: 706
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Re: 1989 GMC s15 - radiator fan constantly running
If it is a stock 1989 S15 fan set up, then it will run whenever the engine is running because it is a mechanical fan attached to the waterpump.
If you have some aftermarket/custom electric fan set up, then it could be the temperature switch that controls the fans is not functioning properly. Now where that switch is on your truck? I don't know, as it is not a stock set up. Start following wires from your electric fan, and you will find it somewhere. |
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