im back in a jeep. The wife and i just got a 1988 jeep xj and i been noticing its been getting over heated. I checked and noticed the e-fan wasn't turning on. So i saw it was unplugged ok that would stop it from working. So still not running so i pulled on the green wire and it kept coming well find out it has been disconnected and so is the other wire to the fan. I wanna get it back to stock and just do a over ride switch later. Any one know where these two wires go so i can get it back to stock?

 

It honestly may just be easier to put an override switch in it now. If you look, you can find a company called ksuspension that makes a harness that will work just fine. I do not know why someone would have disconnected everything like that. What kind of condition is the truck in to begin with?

My thinking would be that the amount of time and effort you will spend trying to make the wiring work will be much more than it takes to run the override switch, since you plan on putting one in anyway.

 

There's coolant temp sensor in the radiator (driver side). Make sure it's plugged in.

The efan comes on under 2 conditions. One; you have the AC on. The efan will cycle with the compressor. Two; coolant temps reaches around 220F. Fan stays on until temps drop (or key off).

With everything plugged in, you can disconnect the sensor and use a jumper across the 2 terminals on the main harness side. With the key in the RUN position (engine can be off), the fan should turn on.

There is also a small rectangular orange box in the same area as the fan and sensor connectors. This is the fan diode that directs power from the sensor or the AC to the fan. Make sure it's there and connected.

 

Thanks for the info. I did put a bypass with a relay. Just the po should never look under a hood of a vehicle. They had a toggle inside that i thought was for the fan but they ran it to the blower motor instead and just wrapped the wire bare on the toggle posts and each other.