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Hi, my name is Jose Sebastian, your mechanic automotive expert, and I will be happy to assist you today. I apologize for the delay to take your query
I try to be here most weekdays and some weekends. If you respond and I do not respond back right away I will do so as soon as I can.
Dear customer it is interesting to know how the short on the door was generated because it is very likely that you have more than one short in the electrical system. I would also like to know if you have made a review of the rear connections of the dash becasue it isis likely to have problems In it. I would like to know if you have not tried to follow the wiring line at the back of the dashboard to verify that you do not have any short in these wiring.
Dear customer, the problem is that I do not have extensive experience in this kind of equipment and unfortunately I do not have the wiring diagram to be able to tell you what the live cable is. nor what are the grounds, what I do know is that this wiring reaches the back of the board, reaching the bottom of the fuse box and from there the circuit goes directly to the battery. The good thing is that these wiring are identified by colors and you do not have to proceed to disassemble the entire branch but it is the coloration at the arrival of the equipment and then you go to the fuses and you see the coloration that you have here, the cable that matches the same color in the equipment as in the fuses is the live wire.this is the way i use when i do not have the wiringg diagram.
Dear customer, indeed, these equipments have an electronic/circuit board. The problem is that the circuit is interlaced. Old cars have many looms that went from component to component, now the new car circuits work in a loom know as CAN-BUS communication, this means that through a single wiring it goes through all the signals that are encoded according to the component that receives this signal.
Basically the signal that passes through the radio reaches the dashboard to the speedo, temperature indicators, warning lights, etc., if there is the possibility that when the circuit board burns, it will disable other functions below, such as the dashboard, the odometer, lights etc. According to the circuit. So, the problem may or in the wirng or in the radio, if it is the radio the prelacement will sort out the other problem as well, if it is the wiring repair should sort the problem.
Yes the situation right now is not easy.Ok dear customer, if you can you can ask in a car audio shop or garage to take a look as well, to see if it is a wiring problem that can be a cheaper fix.In anyway, even after you rate in the 5 stars rating system we can keep in touch. Kind regards.