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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

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Old Jul 7, 2007 | 09:05 PM
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64STYLE
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Question Electrical Question

My 64 f100 has been sitting for years and I am trying to get it strated again. I was checking the wire harness so that I wouldnt get a suprise fire. The voltage regulator is bolted to the passengers side inner fender, behind it (a few inches closer to the firewall) is a small "box" with three wires going to it. It has rotted and come apart. What is it, will the truck run if this part is broken.
 
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Old Jul 7, 2007 | 09:20 PM
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is it 3 wire with spade connectors on if so it is most likly the fan speed resistor for the heater
 
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Old Jul 7, 2007 | 09:29 PM
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THANK YOU. Is this part still available?
 
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Old Jul 7, 2007 | 10:20 PM
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please be sure if that is in fact a fan speed resistor up plug it and see if the heater fan stops running on low speed
 
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Old Jul 8, 2007 | 04:54 AM
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Originally Posted by 64STYLE
My 64 f100 has been sitting for years and I am trying to get it started again. I was checking the wire harness so that I wouldnt get a suprise fire. The voltage regulator is bolted to the passengers side inner fender, behind it (a few inches closer to the firewall) is a small "box" with three wires going to it. It has rotted and come apart. What is it, will the truck run if this part is broken.
Welcome to FTE

What you are looking at is the Horn Relay (B8C13853A ~ Motorcraft HB50), on the right fender apron, several inches behind the voltage regulator.


It's NOT the heater fan resistor.

The heater fan resistor (C1TF18591A - p/n is 1961/64 only) bolts to the backside of the heater (plenum) chamber to the right of the blower motor.

 

Last edited by NumberDummy; Jul 8, 2007 at 05:11 AM.
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