Question about 2003 Jeep Wrangler

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Wrangler jeep heater/AC fan

Fan works is high speed only, not 1,2, and 3 speeds only #4.
Wiring diagram suggest a fan relay/ circuit board. Do not know ifthat is it or where it may be located.

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  • smoke_show23 Feb 09, 2009

    I have the exact same problem, apparently it is the relay, my buddy worked at a jeep dealership and said it was a common problem.. I'm going to replace the relay and see if it makes a difference.

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Usually, when the fan works only on high speed the issue is with the blower motor resistor. It will be located under the dash close to the blower motor itself. It will have a multi-wire plug and feeds signal to the blower motor. An updated resistor maybe available in which case a slightly larger hole will have to be cut for the new resistor. This is not a difficult proceedure, only a couple of screws are holding the resistor in place and most resistors are resonably priced. I recommend you buy the resistor at the dealer, this is a case where you get what you pay for.
Good luck, hope this helps.

Posted on Jan 18, 2009

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