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Install this harness IF after you install the A/C system temps are not working correctly. You will insert the pins into the harness at the FCIM connector 2402B. It is the plug right next to the one that this harness fits into. The back of the bezel will be labeled 2402a and 2402b. The pins are easy to insert you just have to slide the pin lock forward and insert the new pins then push the lock back into position.
Video link https://www.youtube.com/watch?v=z17pTitTfOo