99 05 Grand Am Cooling Fan Discussion Youtube Popular topic thats brought up a lot! questions on when cooling fans should come on, where the car should sit on the gauge, and even how to add in a override. 99 grand am cooling fans not working. krklinegvr4. 10 21 2008, 10:00 am. i am having similar issues. have a 99 pontiac grand am. has the dual fans. i have ruled out tstat, relays, grounds, etc by using a scan tool and testing both the low speed and high speed fan switches and fans come on. so immediatly i think its the sensor or the wiring but.
Brock Supply 99 02 Pt Grand Am Dual Cooling Fan Assy 03 05 Pt ођ 2005 pontiac grand am 3.4 fan help. at what temperature should the engine cooling fan come on. engine is running at 200 205 deg. the fan is not coming on. i just replaced head gaskets on it. i had the heads checked and resurfaced and replaced the thermostat. if i unplug the coolant sensor the fans stay on. 1. just unplug your ac pressure sensor, using a paper clip like picture here both fans will come on when ignition is on and car running, tape up clip and order a c refrigerant pressure sensor from a place like rockauto. share. improve this answer. edited mar 26, 2018 at 9:00. zaid. 5 answers. check the wiring and connections and look for a wire slipping out of the backside of the connectors. and also make sure your engine's at operating temperature. 4 people found this helpful. there is a sensor on the block that went out in mine that fixed the problem. 5 people found this helpful. You need to find out if there is a signal getting to the cooling fan assembly to tell it to turn on. if the coolant has reached 220f. if there is a signal that should tell the fans to operate, but the fans aren't working, replace the fan assembly (approximately $100.00) and is relatively easy to do. but if there is no signal reaching the fan.
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