any voltage regulator gurus here? 2.8 1984

[franklin2]

ok... i think i see whats wrong on my wire system. there is a black and orange wire that is thicker that runs into the "firewall" that is melted at the connector with nothing and no wires hooked to it. I am going to guess this is what should also be wired to the Batt connector on the alternator?

and yes, had the trickle charger sitting on the bat all night, says 13.2 volts.

Tested this melted wire, it shows live at 13.05 volts..... took the tape off of it that was protecting the live section.... ok my guess is to wire this up?

cheers

(one other thing i forgot to mention.... this system is dual battery. the OP wired in a secondary deep cycle battery to use for all the camper stuff at one time. will this also screw up the charging system> it is why I just hooked the lead from the alternator directly to the main truck battery)?

one last question, what size line fuse should i place into this wire set up?

If you look at the diagram, the black orange goes to a splice S109. In the diagram it sort of forms a "Tee" and power flows through the firewall to the keyswitch, and also flows the other way to the battery. You can't see it in the diagram, but that wire that goes to the battery runs up along where the radiator is. That splice and all that stuff is over on the driver's side inner fender. So I am assuming it's like mine right now, that black/orange that tested hot is probably the same wire that goes up from behind the radiator and is hooked to the battery + on the starter solenoid/relay. I am not sure how your keyswitch is getting power if this wire is not hooked up and going through the firewall, unless there is more previous owner wiring.

Where was this aux battery charged from in the circuit? If it was hooked up down the line over on the driver's side, that could have contributed to the wire melting.