Need help with my fan...

matt1171

New member

• Jul 13, 2014

• #1

I have a 2008 JKU and my fan isn't working. Started overheating during a hill climb on a trail yesterday when I noticed that my fan hadn't been kicking on. And after thinking about it, I haven't noticed it coming on in a while. How do I diagnose if it's a sensor that kicks it on or the fan itself is bad and needs replacing? Thanks for your help.

 

wayoflife

Administrator

Staff member

• Jul 13, 2014

• #2

Just to make sure, have you checked your fuse to make sure it isn't blown?

 

matt1171

New member

• Jul 13, 2014

• #3

wayoflife said:

Just to make sure, have you checked your fuse to make sure it isn't blown?

Click to expand...

No. I feel like an idiot not checking that. I'll check as soon as I get home. Thanks Eddie.

 

sitruc

New member

• Jul 13, 2014

• #4

The low speed relay is located in the TIPM and the high speed is located behind the driver side headlight. You might try disconnecting the connector down by the fan motor and apply 12v to it.

YMMV

 

matt1171

New member

• Jul 13, 2014

• #5

sitruc said:

The low speed relay is located in the TIPM and the high speed is located behind the driver side headlight. You might try disconnecting the connector down by the fan motor and apply 12v to it.

YMMV

Click to expand...

Thanks. Where is the TIPM?

 

sitruc

New member

• Jul 13, 2014

• #6

Passenger side engine compartment by battery. It where all the relays and fuses are.

 

matt1171

New member

• Jul 13, 2014

• #7

Fuse and relays look ok. But how can you tell if a relay is bad? Next is to check the fan by connecting it to the battery. Can the thermostat prevent the fan from kicking on?

 

sitruc

New member

• Jul 13, 2014

• #8

matt1171 said:

Fuse and relays look ok. But how can you tell if a relay is bad? Next is to check the fan by connecting it to the battery. Can the thermostat prevent the fan from kicking on?

Click to expand...

The fan is controlled by the computer. I just went through something similar, relays were flakey. I'm not sure how to check them but I'm sure someone here can chime in. Replaced both relays and the resistor which is the connector located top passenger side of radiator. Also replaced fan motor as the bearings were going out.