The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1989 GMC s15

vikasintl · 07-18-2015, 02:44 PM

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?

07-18-2015, 02:44 PM	#1
vikasintl Registered User Join Date: Aug 2011 Location: Lakewood WA Posts: 30	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.