I recently had the water pump replaced on a 2005 3.8L SC MC and noticed the blower for inside the cabin stopped working. I checked all the fuses, even cleaned them. The ground is good at the harness for blower motor. I think the shop may have hurt the wire going from the 30 amp fuse under the hood in the top block, to the resistor controller. I know the system works if I supply power. I back probed the power direct to battery at resistor, and buddy held wire to battery while I went through all the blower settings no issue. My haynes wiring diagram sucked but another diagram I found in a forum showed that 30 amp fuse under the hood directly feeding the resistor. My question is where can I find a mapping of the wiring harness that feeds the resistor from under the hood? It's very hard to reach. I am half tempted to use a stereo amp wire with an online fuse at 30 amps to directly feed the resistor directly from battery. Not pretty but I need defrost working for winter. Any help appreciated. If there is any pin mapping to the connector in pic, that would help. I think it's the body control harness, it feeds in by the resistor in a large bundle of wires.

 

It should say under hood fuse box.

 

Solved...pulled dash, pulled hvac controls and stereo. Aftermarket stereo was massive and had tons of wires all over. Hooked back up controls and didn't even touch a wire, blower worked perfect. Reinstalled stereo with better wire placement. All worked with dash back on. Whew.

 

Nice.