So ive recently tried retrofitting an overhead console that comes with a compass & temp reader. everything on the overhead console plugs in fine, but the temp reading is blank and the compass only reads NW. since my truck didn't come with this option from the factory, I imagine I have to buy a sensor for the temperature. now my questions are
1) what's the name of the part & part # so I can find it at my auto parts store?
2) what needs to be done so that the compass reads the right direction?
any advice would help