[Vwdiesel] Wiring a VW alt in tandem with another

[Erik Lane]

At least have the wire go through a little automotive light bulb. This
works as an 'idiot light' to tell you when it's working properly, and
also limits the current to the field while you're first starting up.
It's nice to keep it down some until the regulator has taken over and
is controlling the power output from the alternator. I would just hook
it up to the key switch so it was on whenever the engine was on, just
like how it's wired in a car. Dead simple, and it does a great job.

Erik

On Mon, Dec 3, 2012 at 8:37 PM, Travis . <tgott at hotmail.com> wrote:
>
> I almost have my JD L&G tractor wired up to run my VW alternator off the rear PTO (front PTO drives the snow blower). My question is on the exciter wire-does it need to have a diode on it or can it just be a switched power source that can be turned on and left on while running, or should it be a momentary switch to excite it and then turn off? I am pretty sure the rest should be easy just having the two alternators and batteries in parallel. The tractor alt has just enough power to run the PTO's and other functions to keep the tractor running so the VW alt is for the addition of the cab and its functions (wiper, heater, fan, lights, etc). I will have another battery in a ballast box behind the tractor (go figure-a vw rabbit battery).
>
> So-diode, momentary switch or just on/off switch for the the exciter wire.
>
> Travis
>
>
>
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