Your jeep commander s radiator fan has one of the most important jobs on the vehicle.
Jeep tj radiator fan not working.
What followed was a multi day google searching and diagnostic session which made me realize there is a lack of.
Connect the other end of the jumper wire to the positive battery terminal.
I replaced the coolant senser the relay and fuse still won t come on.
If this resistor begins to fail then you will see air blow at only some of the fan speed settings.
However the fan in front of the radiator did not come on.
Crdmiller i flew up to a little town in montana and drove it back.
The main fan was working i never saw it go off even though i was just idling from a cold start in the driveway.
Recently i was driving my 2015 jeep wrangler jk unlimited through a parking lot on a 95 degree day and after leaving a stop sign a check engine light flashed on later i would learn it was a p0480 cooling fan relay 1 control circuit and shortly thereafter my jeep overheated.
Attach another jumper wire to the other terminal connecting it to the negative battery terminal.
Should the resistor entirely fail then no air will flow through the jeep s vents at all.
Attach a fused jumper wire to the terminal on the cooling fan that is more exposed after unplugging the electrical connector.
It is the last line of defense between you and an overheating engine.
Just because the radiator fan is not on does not mean that it is not working.
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Should the blower motor seem fine and pressure is not an issue but the fan only works on some speeds then it could indicate a problem with the resistor.
I hot wire fan to the battery it comes on posted by michael iannone on feb 10 2017.