Re: 1977 Dodge Van Class B Conversion Restoration Thread

If your having low or no voltage issues the first thing I would check is that diode based isolator in your first pic on the right side. Put all three connection on one stud and see if things start working right. If so then I would scrap that thing and change to a 100% duty cycle solenoid relay ($20 NAPA).
On second thought, I'd scrap it no matter what. They always fail at the worst times.