Posted by John T on September 27, 2007 at 12:55:37 from (66.244.83.147):
In Reply to: wiring posted by georgec on September 27, 2007 at 10:08:23:
George, if youre replacing an old 2 wire Cutout Relay and LHBD light switch system with what sounds like a 4 terminal (BAT ARM FLD LOAD) Voltage Regulator, to specifically answer your question
". . . and then run a wire from the L connection on the regulator to the Field resistance connection on the switch . . . ."
THE ANSWER IS NOOOOOOOOOOOOOOOOO
You no longer use the switch terminal that used to wire to the gennys Field post.... The VR's L terminal is to feed hot battery voltage to loads (via the switch) like lights n ignition (if a coil ignition) instead of them being fed from the ammeters Load (NOT battery/starter) terminal as they were before
Heres the correct way to wire that 4 terminal Voltage Regulator
BAT wires up to the Load (NOT battery/starter) side of the ammeter. That would be the same terminal (and wire) that wired to the BAT side of a Cutout Relay and also supplied hot battery voltage to lights n ignition. With the VR and its L terminal it now feeds them instead, so remove any wire from the ammeters load terminal to the switch and wire the switch instead to L on the VR.
ARM/GEN on VR wires to gennys ARM post FLD on VR wires to gennys FLD post L on VR wires to BAT input terminal on switch (instead of it wiring to the ammeter)
NOTE on many 4 terminal VR's the termiunal off on one side or the bottom all by itself is the ARM/GEN terminal and the 3 side by side are BAT FLD LOAD
NOTE it will still work if loads are kept on the ammeter (same terminal that wires to BAT on VR) and the L terminal isnt even used, but I would use the L terminal
AGAIN DO NOTTTTTTTTT WIRE THE VR'S L TERMINAL TO THE LIGHT SWITCH
If its an older 3 brush genny you may want to adjust its third brush to the max charge position if youre converting to a VR instead of the old relay n light switch system.
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