First, don't change the fuse size from what the manufacturer had originally. It could cause a fire.
You have a short at some point. Start at the blower motor (which is new) and work your way back to the switch. In the process, check for continunity with high resistance, check the blower motor resister and the relay. Also, make sure the motor has a good ground.
Let me know what you find.
Tuesday, June 8th, 2010 AT 2:05 PM