Quote Originally Posted by Ruflyf View Post
Would anyone mind dropping the glove box and putting a meter on the different leads of the plug going into the resistor pack while the fan switch on the dash is engaged? Probably needs to be a 99 so that its not climate control models.
Hi Ruflyf,

I posted a step by step trouble shooter here: http://www.vehicross.info/showthread...S+Blower+motor

Whether it is auto climate control or not, the circuit diagram I included essentially is the same and it shows where to test for voltage from the battery back through the relays, switch, resistor and motor. Once you have removed the glove box, all you need to get at is easily accessable.

PK is right, the resistor block only slows the motor down, so even if all three resistors are blown, the motor will still operate with the switch in the high speed position.

Oh, and don't forget the obvious, the ignition need to be switched AND the engine running before you will get any power to the motor. There is a bypass relay that disables the blower motor circuit ensuring maximum ampage to the starter motor. Lesser power drains like the radio and other accessories are only disabled at the moment the starter motor is engaged. Don't mean to be synical, but this is easily overlooked!

Good luck!