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Ford Truck Club Forum > FORD F-100 | F-150 SERIES > 1948-1983 Ford F100

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Old November 10th, 2017, 03:26 PM
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jddarnell jddarnell is offline

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Default Heater Control

I am trying to find a vacuum hose that runs from the heater controls inside the truck cab to the Heater Valve in the Engine Compartment near where the Heater Core sticks through the fire wall. There are actually two vacuum hoses, one is black with a white strip that plugs into the Heater Valve and one is solid black which I have no idea where it goes under the hood. My Ford Dealership only has parts for a 2018 model.

Old November 10th, 2017, 09:57 PM
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What year and engine, and does it have A/C?

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
Old July 25th, 2018, 12:19 PM
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JedCrone JedCrone is offline

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I just bought a 74 F100 with a 78 windsor v8 in it. I was tracking my vacuum lines trying to figure out why my fan was only blowing thru the defrost. I discovered that there are no vacuum lines running from the engine to the switches. There are three vacuum lines going from switches to firewall, but on the engine side of the firewall they are all cut. My truck did cone with ac. Anyone know where those are supposed to go?

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Booger , glc , harrison28 , jddarnell , JedCrone , JSoko , Uncle Bob and Boone

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