So I got my jeep and it seemed to be running fine! Until one day I popped the hood and noticed that my electric fan had come loose... right into my belt, it was shredded so I got a new oneand put it on, but for somereason it won't work. I've hooked the fan up and it works fine and I checked the wire it hooks into, and there's no fire, I've checked all the fuses and they all work except for a brown number five under the dash? Any ideas what the problem could be

 

Grab some jumper wires and connect it straight to the battery to make sure the fan is good first.

I sure hope nothing is on fire.

Replace that fuse too.

 

The e - fan does not come on until the engine hits 214 or 219 degrees, Cant remember xactly..
It will also come on if you turn on the A/c..

Ant...

 

I've got it into the red and it still didn't worj and I have no ac

 

Ground it out somewhere besides the relay.

You got the jeep temp wise in the red? That is not good obviously. Connect the fan straight to the battery with two cables to make sure the fan is good before doing anything else.

 

I am not sure on that year jeep, but there is a sensor that tells the e-fan to come on when the engine hits a certain temp , Sounds like that sensor might be bad on your jeep, On my 99 cherokee it is located on the therostat housing, See if you can locate your sensor ( Might be on block think driver side) and see if there is a bad connection there, But it could also be a blown fuse or a bad relay so check those first..

Ant...

 

Thanks I will

 

If The Fan is good, And the fuses are good, and you know the relay is good.. I would lean towards the temp sensor switch..

Ant...

 

Those e-fans are ****. I used one for a 92 on my 95 because they are built way more sturdy. Just find some wire and put it on the battery, should work then.

 

If this is a '93, it has two sensors related to coolant temperature.

There is one in the driver's side head (often called a sender) back by the firewall that is strictly for the cluster temp gauge. It has nothing to do with engine or e-fan management.

The second (not a switch) is in the thermostat housing and sends data to the PCM (computer) that controls various aspects of engine management. The PCM controls the e-fan and will turn it on if coolant temp reaches ~218*.

The only way to really know what is going on with engine temps is with an external unit such as an IR thermometer. Right now unless you have other symptoms of overheating, you don't know for sure that the temps actually got up into the red.

If your gauge is accurate and you and temps are actually getting up into the red, there is a reasonable chance you have some problem other than the e-fan.

One way to test for e-fan operation is to unplug the connector to the sensor in the thermostat housing and see if the fan comes on. The safest way to do this is with the engine off, unplug and then start and confirm fan operation. I've never had occasion to actually do this on my '93 but I assume it works.

 

Thanks I'll try it and keep you all posted

 

So its workinbg I did what you guys suggested and it didn't work so I started going through my wiring harness and found a burned up wire so I replaced that section and its working again

 

Good Job Man...

Ant...