I have a 2000 dodge 2500 cummins and the interiorblower motor currently dosent work and i was asking for any suggestions. The other ques is howdo iget the topportion of thedash out because it is cracked pretty bad.

 

Does your blower work at any speed? If it doesn't work at all, I would start with checking the fuse. If it only works on high then I would check your blower motor resistor control (not possitive how your truck is set up, some will work only on high if the resistor goes or not at all).
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You can't get to it from the top. You will have to take out the entire dash. The blower motor is inside the air mixture box which is bolted "on the inside" side of the firewall.

 

A work pickup I drove had very low and very high. and we just put a new switch in and worked fine.

 

I put in a new blower motor and the old was bad for sure didnt work at all and now the motor only blows on high. So im gunna check the resister would you possibly know a basic location and what it may look like.