I just acquired an 84 that runs good for 300 bucks. It does have a few issues. the main one is the radiator fan not working. someone ran a wire direct to battery and had it on a toggle switch. I would rather put it back to original. I took off resistor at fan and it is shorted. I tested the wires coming to the relay and no voltage on any with key off. Fuse looks good but my meter has become unreliable in the ohm/fuse features. That is as far as I have gotten. I think there is supposed to be hot on that relay, if so could someone please point me to the next area to check? thanks
The big issue is why the re-wire... something was wrong that the PO did not fix... it's all supposed to be hot until it gets to the switch on the engine.
I do not know. I am gonna have to explore and test it all i suppose. The fan does work hooked direct, and the resistor is bad. That is what I know for sure. I hope the po just didn't take the time to check everything. The resistor is bypassed in the hi mode if I am seeing this wiring correctly. Guess I need to back track from there.
resistor tested bad so i went to parts store. They found one they said would work. i took it home and tested it with meter. 1.5 ohms. thats a little high isn't it? I do not know if i should try it or not. any advice? thanks.
I tried something today. I saw in a post that I could use a green wire with white stripe behind the accelerator for keyed power to the fan. I checked it with a meter and it had 12 volts with key on. I spliced in the hot wire to the fan and nothing happened. Now there is no voltage on the wire. I took fan wire off and the voltage is still gone. fuses check good. Could someone tell me what that wire is for? I am not sure what I have messed up. Hope not too bad. thanks.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
I may have to go by what you posted. The po had it direct from the battery on a toggle switch. I want it to be automatic. I know the resistor is bad and hard to find. I thought I would try wiring to key power for now. the green wire I tried has a white stripe and I know it had 12 volts before I messed with it. I do have electrical experience but do not have any wiring diagrams to go by. the green and white wire comes from under the dash and through the firewall at a connector behind the gas pedal. I can't get 12 volts on it now so I fear I have done some damage. If someone has any info on this wire I would appreciate it.
When I got my 84 the resistor was bad also, I bypassed it and found the fan would not run when the coolant temp got high enough that it should run, I also had no reading on the temp gauge.
What I found after quite a bit of digging was the previous owner had replaced the temp sender on the engine that feeds the temp gauge and turns on the radiator fan with a new one.
I found out that if you order that part from GM and they do a computer look-up it gives a number for a Fan Switch which is incorrect, the incorrect sender had benn installed in my car by the previous owner.
When I figured out that issue and installed the correst sender everything worked great.
Does your temp gauge work when you run the car?
------------------ Where will the road take you today?
yeah the temp gauge works. I went through the same as you with my 85 fiero. I haven't had time to mess with the car today. I am baffled as to what I could have done to lose the 12 volts on that wire. I am gonna recheck the fuses tomorrow.
