Hi, I have a 1984 Vette and I want to install a coolant fan toggle switch? I just bought the car and it appears the car has been having fan issues? new thermostate, new fan temp sensor, new temp sending unit, new relay, I purged / bled the engine coolant system several times, checked for bad head gasket with kit that attaches to radiator that turns color if bad head gasket, cleaned radiator outside, flushed system. Somebody has been in here before...the new relay has completely new relay and wiring in which every wire is white? wtf? lol....the fan turns on with the AC turned on and more often then not, while the AC is off the fan will kick on but, most of the time it won't turn on and car overheats. It doesn't overheat with the AC on.

I'm getting tired of playing with this; I want to hook up a toggle switch to the fan, I would like the toggle switched wired to the car's ignition power on so, I don't have to turn the fan on and off manually every day but have the ability to turn off when I want it off? Since all my wires are white going to the relay; does anyone know a way to wire the toggle switch? I bought a 2 & 3 wire toggle switches? Any help will be appreciated!!

 

Welcome to the forum. It's hard to determine how to wire it without a wiring diagram. With a toggle switch you also run the risk of back feeding through the relay contacts and causing damage to a sensor or your computer. It's possible that one of the new temperature sensors is faulty or when someone was in there before, they miswired something.

 

Yea, a hack was in my car! lol...hopefully I'll figure it out today? and clean it up!