heater switch
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Freshman User
Joined: Apr 2002
Posts: 37
Likes: 0
From: NYC USA
heater switch
I was wondering if I could get some help on changing my heater switch.
The heat only used to work on high for the longest time, until recently nothing comes out. I bought a new blower motor, & ive changed the resistor that I got from a junkyard..the fuse is good.
So by process of elimination Im down to the switch.
Any help would be great. Thanks
The heat only used to work on high for the longest time, until recently nothing comes out. I bought a new blower motor, & ive changed the resistor that I got from a junkyard..the fuse is good.
So by process of elimination Im down to the switch.
Any help would be great. Thanks
Elder User
Joined: Dec 2000
Posts: 570
Likes: 1
From: Austin Texas (area)
heater switch
The blower-speed switch controls the blower speeds via the ground to the blower motor. HIGH speed is a direct ground to the motor. The other speeds come from the resistor pak....three speeds with the LOW being the highest resistance circuit. The resistor pak from the junk yard may be bad....the pak also contains a termal-limiter which could be dead too. The blower switch can be removed from the function-control panel by pulling the electrical connector, removing the screw that mounts it to the panel and taking off the **** on the switch. It could very well be the switch, but I'd suspect the pak first. Also Fords had a wiring problem in the harnass back then....I had the problem in my '81. Need anymore help....just email and I'll try.
Senior User
Joined: Aug 1999
Posts: 488
Likes: 0
From: Bel Air USA
heater switch
You can do a continuity test on the resistor. You should have continuity between all four of the terminals with varying resistance. The resistance should be no more then 5 ohms at max.
