Allis CA voltage regulator wiring

Im unsure if you originaly had a 3 terminal (BAT ARM FLD) or a 4 terminal (BAT FLD LOAD ARM) VR but either can be made to work regardless....

On many 4 terminal VR's the 3 side by side are BAT FLD LOAD while the one off by itself or the bottom is the ARM terminal.

BAT on VR to load (NOT battery/starter) side of Ammeter

FLD on VR to FLD on Genny

ARM on VR to ARM on genny

LOAD is what feeds hot battery voltage up to loads like lights n ignition, usually to the BAT input terminal on the switches.

If it only had a 3 terminal VR before, loads were served off the ammeters load terminal, same one that wired down to BAT on the VR. If you change from a 3 to 4 terminal VR, they should be wired instead to the L terminal down on the VR and unhooked from the ammeter buttttt t the ammeters load terminal still wires to BAT on the VR.

It would still work if you didnt even use LOAD on the VR and instead fed loads off the ammeter (same as BAT on VR) but I would wire it correct i.e. serve loads off the L terminal on a 4 terminal VR

Get it ????? ???

Ol John T and all in indiana

DISCLAIMERS LOL

1) Some of the Fords (not sure which models) used a Class B versus Class A charging system so if its a Class B you better ask the Ford people about polarity swaps.

2) I cant know how that tack works so dont bet your life on nutitn I say DUHHHHH H

That being said (cant help myself thats the lawyer side of my lawyer and engineer brain workin lol)

1) I think Rat Shack has some sort of low power solid state voltage converters, you may wanna look into that first.

2) If not the extra battery ought to work fine and a motorcycle battery ought to run that tach for hoursssss sssss sss upon hours before requiring a charge.

3) Theres an outside chance (Id try it) the tach, if its the kind I think it is, may still work at 6 volts PERIOD. The tachs Im thinkin of simply use the closing ignition points as the conductive ground path trigger signal so they do their magic electronic counting thing and send current through a galvo to deflect the needle. Many soild state devices like a transistor or SCR etc are more current then voltage devices and if theres enough forward bias voltage they will still conduct n trigger and work SO IT MAY WORK BUTTTTT TTTTT TTTT Im still worried about the galvo current source/use and if its based on 12 volts and you only have 6, the needle deflection wont be accurate grrrrr rrrrr rrr UNLESS you can trick it into being for say 4 versus 8 cylinders (if it has such a setting) which might make it accurate again on 6 volts DARNED IF I KNOW

Im trying to explain why I dont have your answer lol

I would try it at 6 volts (neg ground of course) ,,,,, ,look for a 6 to 12 converter,,,,, ,,,,,add the battery as you mentioned IN THAT ORDER BUT NOOOOO WARRANTY

If any this works post back buttttt ttttt if any of this lets the smoke out of the tach and fries it you need not comment lol

take care Denny

John T

John T