Dual fans Both fans are coming on at the same time....there is no wire connected to the switch on the passenger side head...could that be the reason? Or is it wired so that both come on at the same time, any advice would be great. And also, around what temp does the primary fan come on? 89 iroc z...5.7 TPI |
Re: Dual fans Depending on how long you have owned the car and what has been done to it they could have been wired that way by a previous owner, someone wired fans on my 87 that way, spliced into power for one fan to run the second instead of fixing it correctly... just a thought |
Re: Dual fans
Originally Posted by 2012sergen11
(Post 6169546)
Depending on how long you have owned the car and what has been done to it they could have been wired that way by a previous owner, someone wired fans on my 87 that way, spliced into power for one fan to run the second instead of fixing it correctly... just a thought |
Re: Dual fans The fan switch is a part prone to failure from a lousy design. Instead of replacing it they may have taken the wire from it and joined it to the wire from the ECM that turns on the primary fan at or near the fan relay. Trace back to your fan relays and see if an extra wire is spliced in somewhere |
Re: Dual fans https://cimg7.ibsrv.net/gimg/www.thi...033745907c.jpg [I]Here are the schematics from a 91 camaro w/AC. Both fans will come on if there is AC pressure. Otherwise they're pretty independent. Primary fan is controlled through the ECM. And trhe secondary fan needs AC or coolant switch, and is not ECM controlled. https://cimg8.ibsrv.net/gimg/www.thi...247875ff77.jpg |
Re: Dual fans The 90-92 730 is different from the 165 as far as the pinout goes. The wiring should be the same fashion. Secondary with head fan switch or ac request |
Re: Dual fans If that fan switch wire is grounded it will turn on both fans |
Re: Dual fans
Originally Posted by antoine
(Post 6170441)
If that fan switch wire is grounded it will turn on both fans that that will happen |
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