Thanks @
WNDSRFR for the diagram, helps clear up the circuitry. I was not aware that one dump cable was feeding while the other was receiving and the charging makes more sense. Does the voltmeter read the voltage of the dump pack or something else in the controller?
I've tried trickle charging the batteries but doesn't seem like that is the issue. Most of the signs point to no dump pack/bad dump connection. I'll see if I can tighten the contacts in the large dump wires in case they have come lose internally.
I might take off the whole system and reinstall it, I feel like I've tried everything at this point:
- Swapped for new dump batteries (this one helped as before I couldn't even go WOT)
- trickle charged dump batteries
- Tightened all nut connections
- Went back to WOT switch from Procede
- Replaced Starter Battery
- Crimped 3 blower connections.