My blower works only sometimes and when it does it only works in the deforst position. Tonight I gave blower a hit with my fist and it worked. All speeds seem to work when blower is working. Is this vacuum related, a bad connection, a relay, resistor or what? Any ideas as to where to look? Switch, blower or engine compartment?

 

This morning I went to start the truck and the battery was stone dead. I suspect I shorted something when I gave the blower a hit and it worked. Any ideas? I have the battery disconnected and charging. I pulled the 30A blower fuse and also the wire to the blower.

 

It seems that no one replies to your post. I'm no mechanic nor expert in driving. And I've just changed my Mercedes heater core, with others' help. I'm not sure how this will relate but it's a heating problem too. Maybe you should consult a mechanic if you can afford or find someone who can help. You see, it's really less expensive if you have knowledge on this, at least... [&:]