i need to know the coolant sensors!!!
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Junior Member
Joined: May 2006
Posts: 88
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From: Minocqua, WI
Car: 1989 Camaro RS
Engine: TBI 350 - Approx 300hp
Transmission: 700R4 (Soon to be Built)
Axle/Gears: 3.73's & Eaton Posi
i need to know the coolant sensors!!!
OK, i have an 89 RS, the fan switch is located in the passenger side head betweent he #6 and #8 cylinder correct?. There is also a coolant sensor in the intake manifold next to the thermostat, what does that run? there is also a sensor in the driver side head between the #1 and #3 cylinder, what does that run? and my final question is, does the ecm have anything to do with the fan switch (in the passenger head) turning the fan on??? Please could i get some help?? 
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Joined: Jul 2006
Posts: 365
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From: Kent, WA
Car: 83 z28
Engine: boat anchor 305 (ex CFI)
Transmission: 700r4
Axle/Gears: 3.23 10 bolt
The one between the 1 and 3 on the drivers side is the coolant temp sender, and should be one wire. The temp sensor for the ecu is a 3 wire sensor, and should up by the thermostat housing. I am really not sure of the location for the fan switch, I have a clutch fan set up and don't have to worry about the electric fans not comming on. Hope this helps man.
Junior Member
Joined: Apr 2006
Posts: 21
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From: midwest
Car: 88 trans am
Engine: 305 TBI
Transmission: auto
The fan switch is between the #6 & #8 spark plugs. I run a switch from a buick grand national part # TS136 bought at Carquest about $40.00 and lasts around one year. This turns the fan on at 220* degrees and off at 200* these are estimates from memory but should be close. I have a 180* thermostat.
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Joined: Apr 2006
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From: Hammond IN
Car: 1989 RS convertible
Engine: 305 TBI LO3
Transmission: TH-700-R4
Axle/Gears: stock axles 3.73 LSD
The fan switch is between the #6 & #8 spark plugs. I run a switch from a buick grand national part # TS136 bought at Carquest about $40.00 and lasts around one year. This turns the fan on at 220* degrees and off at 200* these are estimates from memory but should be close. I have a 180* thermostat.
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From: Victoria BC Canada
Car: 87 Camaro IROC
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 3.23
why not just bypass the relay and have your fan running when you put your ignition to the on position. thats what i have, it keeps the car running cooler and cools down faster if i turn the engine off. im about to install an electric water pump so i can cool that bastard even faster
Member
Joined: Aug 2006
Posts: 160
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From: West Palm Beach, FL
Car: 88' Camaro IROC-Z
Engine: 383ci TPI
Transmission: 700R4
Axle/Gears: stock
I was under the impression that the ECM and two different A/C Related switches controlled when the fans come on, if that's the case, why the fan switch? and if I remember right, a very tough one to work on.
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Joined: Apr 2006
Posts: 21
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From: midwest
Car: 88 trans am
Engine: 305 TBI
Transmission: auto
Not hard IF you can comfortably get under the car. Yes other switches regulate the fan in A/C or defroster mode. The fan switch is there for fan control when your not using A/C--defroster. You can wire it to come on with the key and by-pass the switch, but there is pro and con with this method.
I use the switch in the head for fan control.
Good luck.
I use the switch in the head for fan control.
Good luck.
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