Thread: wiring diagrams
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Old January 1st, 2011, 01:38 PM   #8
wrenchmonkey
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Join Date: Mar 2004
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Default Re: wiring diagrams

Hey Mike,
That diagram pictured above a few times for alternator installation is based upon a custom switch and light as they've drawn it. Our Vdubs, if running stock ignition switches as early as your avi/name won't have the "accessory" position or that type of "idiot light".

If you got OG wires in your bus then do this:

B+ on alt ---> battery positive (+). In the diagram it's jumped to the battery via the starter's input but it could be direct wired too since you have a bus and the battery is right there.. Just need to make the wire of sufficient size (6mm is/was stock).

D term on alt ----> to blue-green wire from OG voltage regulator. (this will need an extension usually). It looks like the oil pressure wire but way shorter in the bus.

The idiot lights on the OG guage(s) are positively (+) powered when key goes to "On" position and they are grounded (-) via the engine case by oil pressure switch and by voltage regulator to light-up. The D terminal on the alternator will provide the ground to that idiot light when it's not spinning (ie: not running or if you throw a belt).

Hope that made sense and answered your question.
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