1990 Ranger Defroster Fan Problem.

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Dec 26, 2003 | 02:49 PM

BroncoFan74

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1990 Ranger Defroster Fan Problem.

the defroster fan isn't working. all fuses in box are good. all maxi fuses under hood are good. it has a new switch for the defroster fan and it should be good. is there an inline relay or hidden relay for the defroster fan? i also found a large un marked relay just in front of the pasanger side door but don't know what its for. is there anything else that could be wrong or am i missing something? any help would be apreciated.

Dec 26, 2003 | 11:34 PM

Dealford

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From: Belleville, Ontario

Welcome to FTE BroncoFan74.
There is a resistor for the heater fan as well. Usually when it goes, you only get high speed fan.

Dec 27, 2003 | 08:38 AM

BroncoFan74

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thankz for the welcome. i don't even have high speed fan its just no fan at all. could the resistor still be the problem? and if so where would it be located.

Dec 27, 2003 | 01:57 PM

87 XLT

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From: SoCal

Turn on the fan and give the blower motor a good whack with your hand. If that gets the motor going, replace it. If that doesnt work & IF this is wired the same as my 87, you need to check for 12 volts on the orange/black wire at the blower switch & blower resistor etc etc. A wiring diagram would be very helpful. www.helminc.com will sell you the XLNT "Electrical & vacuuum trouble shooting manual" for about 30 bucks. BTW, it's not likely a blower resistor problem.