Fan wont cut on with AC!!!
Fan wont cut on with AC!!!
I havent had time to check it out, but I'm 90% sure that temp wont cut it on either. What should I check for? This sucks!!!
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With this car, it's never a question of "can I...", only "will I..."!
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With this car, it's never a question of "can I...", only "will I..."!
If the tempature of the car won't kick it on either, it could be the tempature switch that is bolted directly into the block between the number 6 and 8 plugs. These are on the passenger side of the car. First I would check to make sure the fan motor is still working. Do this by locating the fan relay. Unplug it, and turn the key in the on position. On the plug end find the hot wire, usually black with a red stripe. Plug a wire into it, then take that same wire and plug it into the ground on the same plug. The fan should kick on. If not then you need a new fan motor.
Supreme Member
Joined: Sep 1999
Posts: 1,383
Likes: 0
From: Oakville, Ct
Car: 1991Firebird T/A
Engine: 350
Transmission: Modified Viper t-56
Axle/Gears: dana 44, 3.55
so your aware, if ya trace the wires back, the fan relay is mounted on the firewall to the drivers side of the brake booster.
Steve
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86 Firebird, LG4, t-tops, 2.73 open rear, SLP 3 inch cat back exhaust, catco cat, 1 inch carb spacer, Fiberglass cowl induction hood, Formula wheels, vette servo.
Current Plans: Waiting on: rear end parts- upgrading to 373's, 28 spline axels, slp zexel torsion posi, and a disk brake setup. Also have lowering springs, front struts, and hopefully a new mild 350.
My Webpage- Battle of the birds, My own Thirdgen Page, still under construction, http://www.geocities.com/soares711/index.htm
88 Firebird Formula- deseased 2/9/99- 305 TPI, SLP 3 inch exhaust, SLP Intake runners, SLP cam, 3.45 BW disc brake posi, WS6, NOS, and all that good stuff, 13.8 on the motor, 12.89 on NOS and slicks! Hit by what else!?!? a FORD EXPLORER!!!!!!
Steve
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86 Firebird, LG4, t-tops, 2.73 open rear, SLP 3 inch cat back exhaust, catco cat, 1 inch carb spacer, Fiberglass cowl induction hood, Formula wheels, vette servo.
Current Plans: Waiting on: rear end parts- upgrading to 373's, 28 spline axels, slp zexel torsion posi, and a disk brake setup. Also have lowering springs, front struts, and hopefully a new mild 350.
My Webpage- Battle of the birds, My own Thirdgen Page, still under construction, http://www.geocities.com/soares711/index.htm
88 Firebird Formula- deseased 2/9/99- 305 TPI, SLP 3 inch exhaust, SLP Intake runners, SLP cam, 3.45 BW disc brake posi, WS6, NOS, and all that good stuff, 13.8 on the motor, 12.89 on NOS and slicks! Hit by what else!?!? a FORD EXPLORER!!!!!!
Member
Joined: Jul 1999
Posts: 421
Likes: 0
From: Norfolk, VA
Car: 1985 Trans Am
Engine: 305 TPI
Transmission: 700R4
I would put my money on your freon charge. If you don't have enough freon in the A/C system, you won't build up enough head pressure and the fan won't turn on. Check your freon content.... I'll bet it's low or not even there.
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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil
15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!
http://www.geocities.com/transam85tpi/
Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/
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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil
15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!
http://www.geocities.com/transam85tpi/
Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/
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Member
Joined: Jul 1999
Posts: 421
Likes: 0
From: Norfolk, VA
Car: 1985 Trans Am
Engine: 305 TPI
Transmission: 700R4
Damn.... good thing no one took me up on that bet... 
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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil
15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!
http://www.geocities.com/transam85tpi/
Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/

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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, Wonderbar, TB Coolant Bypass, Ported Plenum, Modified MAF, Syclone Fuel Pump, JET Airfoil
15.556 @ 86.65mph, Nov 10, 2000.... I know it sucks.. but it will get better!
http://www.geocities.com/transam85tpi/
Member - The Tidewater Trans Am Club, Norfolk VA http://www.geocities.com/ttacva/
If you need a quick fix while you figure something out, buy a $3 fog lamp relay from Auto Zone. Splice as wire off the hot (green?) wire going to the AC compressor to act at the activator. Splice into the fan's hot wire, and connect the relay to the battery, and you're ready to go. I have been around the block with fans and fan wiring. Now both my fans run off fog lamp relays. One is AC activated, the other ignition activated. Ideal: No. Works: Yes. The best solution after 100 hours of fruitless labor trying to fix the stock system: Definitely.
Jeff
Jeff
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