I've solved one cooling problem and now I'm finding new ones. I replaced my a/c pressure cut/off switch, so now the a/c and also the high speed fan appear to be working correctly. But, the low speed fan is not engaging at all. I suppose that's why my fan is not coming on until the gauge reaches the L, which is when the high speed fan kicks in. I've been tracing the wiring, and it appears that my resistor that mounts at the bottom of the radiator, which reduces the current for the low speed fan, is defective. Here's my question.....Is this resistor a replaceable unit? The diagram on Fordpartsonline.com makes it look like I have to replace the entire unit, including the fan, motor, shroud, housing....
