Okay, so with the meter set to DC volts, on 20 volt setting. Set the negative lead to battery ground and the red lead is going to be for testing each wire. Make sure you have a good connection on the ground side, check it at the battery for a good reading. And you are going to back probe each of these wires with the connector still plugged in, its going to be tough because of its location, but here is a diagram of how to back probe a connector without damaging the wire insulation. And you are going to check the power wire first, just to make sure it's okay, it's going to be the red/white wire first, that should be battery voltage. Next go to the yellow/orange wire and as you're turning the hot/cold knob the voltage should should go from 12 to either 5 or 0 volts. Either way it should vary as you're turning the control knob, that's the important thing. This wires are the ones with the red arrow on the diagram I sent earlier. We'll start there for now, and depending on the voltage readings we'll decide which way to go next. Any questions, just ask, If voltage is present and it's working okay, we'll go after the climate control module a bit next.
Images (Click to enlarge)
Wednesday, December 18th, 2019 AT 2:43 PM