Also, inspected interior light circuit prior to test with control box.

I traced out the wires and trimmed down the system to only non ICE engine sensors.  I can control all of the sensors via serial pins controlling paralle Reed relays.  I am still drawing the whole schematic out but my shortterm goal would be to get a new 12V battery and use it to test the serial control where the battery is also powering the PSU.  I need a cheap battery charger, a clean battery and to solder the prototype circuit together.  I should wait until I finish the “nervous system” before taking it in for body work.  My Ebay auctions failed twice so I will be trashing a few items now.  I have made excellent progress on the electrical lately though.  A full PC simulation is ideal.