Tripac apu

[Lonestar10]

Tripac 2007 model. Lost all grounds as far as I can tell. Started in fall fuel shutoff lost ground then in January case fan lost ground now fuel pump lost ground. And alternator works when it wants. I fixed a broken connection on alternator was short wire to a bolt on alternator and it worked for 5 days putting out 14 volts now back to 0 output.

Where do I even begin? Case has ground and engine is grounded but no wiring ground. All fuses are good all supply powers turn on and off as they should. Idk if all the items run off CH ground or not.