I have an '85 Fiero and the PO for some unknown reason switched out the electric fan thermostat relay with a toggle switch to control the fan. When I purchased the Fiero the guy also gave me a brand new kit to convert it back to a temperature based fan switch. It has a relay a positive battery, negative battery, secondary fan positive (useless since I only have one fan), positive primary fan, 12-v ignition source and a temperature probe. So I have 2 questions about this. 1. Is the temperature reading I will be getting in the front of the car with the probe that goes into the radiator fins sufficient for telling true coolant temp? 2. What is a good 12-v ignition source to splice into or just hook it up to? Thanks!

I PERSONSALY would run a 12v source from the fusebox under the dash, add-in a fuse, or just jump directly off the fan fuse already in use. the temp of the radiator is not the best way to do it... its doable, but id probably set it a bit lower, maybe at 160deg?

I am actually goin to do the exact same thing..my intention is to use the actual 12v fan power wire for my 12v power source. The factory plug also contains a good ground.jump the relay box directly behind the driver headlight..once jumped properly their will be a constant 12v at the factory fan plug that would plug into the fan..this 12v will be turned on and off by the ignition..I also agree to set the thermostat at 169 to start..get ahokd of a laser temp reader.they are great fi this type of job..you will know exactly what temp your rad. Is and be able to set it accirdingly..good luck sir. Fc

You do have a second fan, under the trunk carpet on the passenger side. If you still have the pipes it blows cooler air on the coil and alternator. When you see the temp gauge climbing a switch is much more comfortable than wondering if and when the fan will come on.

Thanks guys! I appreciate it! I'll let you know how it goes!

Okay so I went to install the relay kit and was looking for the wires I needed to connect it to and I realized I had no idea which was which. I took a picture of the connector coming from the radiator fan that the toggle switch is connected to, I was hoping you guys could help me out and tell me whats what.



It looks like the toggle switch just connects the black to the red (negative to positive) but I don't get how a 12v power source could be coming FROM and going TO the radiator fan.

[This message has been edited by Jecklen16 (edited 11-22-2013).]