I got a 1998 dodge 2500 4x4 the a/c blower won't shut off. It only has one speed. You can turn off the a/c compressor and the fan keeps on running. Any Ideas?

 

I have an 01 that only blows on High. While looking into it at other sites it looks like the cause is a resister that is in the fuse box in the engine compartment. I just found this info tonight so I haven't tried it yet, but I will.

Here is a link that I found for a service manual on my '01. While I know you have a different year, the principle is probably the same, and maybe even the same part or very close. Check it out and see if it helps......

http://www.neonix.org/nero/files/2001ramsrvcmanual.zip

Then look up "heater blower" in the index. It shows pictures, and gives instructions. Good luck