Blower motor or resistor? January 29, 2011, 07:47:36 PM So today was the first time I had a go at doing a heater core, my old '86 Cougar that I sold to a buddy of mine hasn't had heat since last winter when I bought it and sold it to him. It was actually some pretty simple stuff, a lot easier than it's made out to be, and we did it with the passenger door closed (won't open). Anyway, when I had the car the blower motor would come on and off periodically, pretty much when it felt like it, didn't matter if it was on high or low, it always blew the same speed. Since he has no heat or A/C in the car, he has never turned the fan on (in the past year) to see if it ever worked for him. (and of course he told me this after everything was put back together) I don't know how to tell if this is because of the blower motor or resistor. Is there a way to test either of them? Quote Selected
Blower motor or resistor? Reply #1 – January 29, 2011, 10:00:33 PM The blow running off and on by its own choice is odd.If its running or did run at one speed and that speed was "hiigh" then yes the reisitor is blown.remove and test across the fuse on the resistor bank with a meter. (unplug the resistor bank though.if its open, then fix it with a very very tiny small guage wire or you can actually find a thermal fuse replacement.I think a couple years ago softtouch or someone found a direct replacement PN for it. Quote Selected
Blower motor or resistor? Reply #2 – January 29, 2011, 10:27:10 PM I have a similar issue but my blower stays running on a very low speed when the controls are turned off. still have all speeds and functionality but the blower wont turn off completely. would this also be a resistor issue? /end hijack Quote Selected
Blower motor or resistor? Reply #3 – January 30, 2011, 12:09:54 PM Quote from: jcassity;351189The blow running off and on by its own choice is odd.If its running or did run at one speed and that speed was "hiigh" then yes the reisitor is blown.remove and test across the fuse on the resistor bank with a meter. (unplug the resistor bank though.if its open, then fix it with a very very tiny small guage wire or you can actually find a thermal fuse replacement.I think a couple years ago softtouch or someone found a direct replacement PN for it. Well I can't remember if when it actually did come on if it blew on high or not, but it does not blow at all now. Quote from: 88turbo;351195I have a similar issue but my blower stays running on a very low speed when the controls are turned off. still have all speeds and functionality but the blower wont turn off completely. would this also be a resistor issue? /end hijack My Lincoln does the same thing. Quote Selected
Blower motor or resistor? Reply #4 – January 30, 2011, 12:23:45 PM is this a lever control or eatc ? Quote Selected
Blower motor or resistor? Reply #6 – January 30, 2011, 03:21:35 PM Quote from: 20thanniver-ls;351228Lever control The lever is still allowing SOME vacuum to pass in the closed position.... Might be some dirt stuck up where it actually closes off the line. Quote Selected
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