[Vwdiesel] Wiring a VW alt in tandem with another

[Travis .]

So if the light is on-then the alt either isn't working or isn't spinning but if the light goes off the wire that does the exciting no longer draws electricity and the light goes out? The VW alt will be running from the rear PTO which is ran through a separate switched power source to turn the PTO on. Could I just tap into that as the alt wouldn't be turning unless the PTO is also energized?

Travis

> Date: Mon, 3 Dec 2012 20:44:39 -0800
> Subject: Re: [Vwdiesel] Wiring a VW alt in tandem with another
> From: eriklane at gmail.com
> To: tgott at hotmail.com
> CC: vwdiesel at vwfans.com
> 
> 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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