|
1989 firebird electric fan not working fan won't kick on when engine overheats. when you turn on the a/c the fan kicks on. had someone look at it and said the ecm is the issue. replaced the ecm and no change. checked thermostat and is ok. I guess I could test the wiring from the thermstat to the ecm and see if there is current. any ideas? |
Re: 1989 firebird electric fan not working What engine ? V6 2.8l or v8 tpi or tbi ? The thermostat doesn’t control the fan, either it’s ecm controls the relay or there is a cylinder head temp switch. |
Re: 1989 firebird electric fan not working thx i will try the relay. |
Re: 1989 firebird electric fan not working
Originally Posted by BarryKohl
(Post 6283219)
thx i will try the relay. two fan setup ? |
Re: 1989 firebird electric fan not working The fact that AC turns on the fan shows the relay to be working fine. Depending on the engine and fan setup it sounds like a common failed fan switch. Tell us which engine and whether you have single or dual fans |
Re: 1989 firebird electric fan not working There are two "temp sensors" on the car, one drives the fans and one drives the gauge. If you take the wire off the fan switch and touch it to ground with the key on the fan should start up. If it does the switch is bad, if it doesn't then you have a wiring issue or relay issue. |
Re: 1989 firebird electric fan not working
Originally Posted by Aviator857
(Post 6283425)
There are two "temp sensors" on the car, one drives the fans and one drives the gauge. If you take the wire off the fan switch and touch it to ground with the key on the fan should start up. If it does the switch is bad, if it doesn't then you have a wiring issue or relay issue. Like you mention a cylinder head temp switch that’s normally open circuit. To the op if you want help diagnosing the issue instead of throwing parts at the problem. You need to state what your working on. Your signature is incomplete. |
Re: 1989 firebird electric fan not working This might not be the issue but just a tip for those who are experiencing the same problems. Happened to me once were my fan wouldn't turn on. The issue was that the contacts on the fan plug were so bent that they weren't making contact. Just took a small flathead and opened up the contacts and problem fixed. :2cents: |
| All times are GMT -5. The time now is 02:29 PM. |
© 2024 MH Sub I, LLC dba Internet Brands