W900L blower problem

[iceman]

I had this issue on one of our 99 379 Petes, and what it ended up being was the first plugin coming from out of the motor. And I found no evidence of what was wrong with it except when you moved it slightly it turned on an off. Before getting it fixed I would actually hit the dash below the glove box and it would start. Not sure if if this could be your issue, just a thought.