Dual fans
#1
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
#2
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Car: 1987 Trans Am
Engine: 305 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
#3
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
#4
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Car: 92 Camaro RS
Engine: LO3
Transmission: T5
Axle/Gears: stock
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
#5
Junior Member
Re: Dual fans
[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.
#7
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Car: 1988 camaro z28,1997 camaro lt1
Engine: 355 afr 195 heads,tpis big mouth
Transmission: 700r-4 built by me 3-4 z pack
Axle/Gears: 3.42
Re: Dual fans
If that fan switch wire is grounded it will turn on both fans