Your instructional expertise is is brilliant! the world needs more mentors like you. reminded me of many problems I had in the past and only found out by myself the hard way. As so few shared as you are doing. Yours a retired tech Glenn

Nice video, I have been trying to fix my unit like this one. Like the idea of not having to put it all back together to test. I have looked for a schematic for this main board without success. Do you have a source perhaps of the schematic? My issue, the back lighting remains on even after the car is shut down. I am the original owner, so no modifications have been made to the wiring in the car. Thanks in advance