2002 Diplomat, won't start. Also the N in the transmission pad doesn't light (the little red "economy" light is on, but nothing else). Also the step won't run, the power mirrors don't work, and the power seats won't work. All of this, all at once. The dash lights up, fuel pump comes on, dash AC blower comes on, headlights are bright. I had the batteries tested and they are fine. I have checked every fuse I can find, including the 2 in the VIM and they are OK. This has to be a power supply i