'99 Mounty Blower Resistor

[Bobmbx]

Hey gang,

My Mounty's blower motor only blows on high. I pulled out the resistor, which I had replace about 2-3 years ago, and it looks pristine. I measured the resistance, and found that from any pin to any other pin there was zero resistance. I did this with the resistor disconnected from the harness. I measured at the pins, and on the resistor side with the same results. I measured from end of the coil to the other, and got the same results.

I'm at a loss to explain that. I examined the coils, and none are touching each other. There is no corrosion on either side of the plate.

As I was typing this, it occurred to me it could be my VOM battery being weak. Damn. I just got it all put back together.

But, the VOM has nothing to do the blower resistor.

Thoughts?

 

[BrooklynBay]

Did you use an old style analog meter or a newer digital meter? You won't have variable resistance to change the blower motor's speed if the resistor's coils are shorted.

 

[koda2000]

you have to have resistance for the blower resistor to work. i'd be highly suspect of your VOM to begin with.

 

[partsman48210]

heres a schematic for a 99 explorer....should be the same. you said you have 0 resistance. for a quick check of your meter hold the 2 leads tightly between 2 fingers on each hand. it should read a small amount of resistance