Wiring for Alternator and tacho

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 · 6 Apr 2013, 2:14 pm

#950275

Hi guys

I need to rewire the Alternator in my 1967 beetle.

(See attached photo)

The B+ terminal goes to the Start motor. Does the D+ go to the Alternator light in the dash?

Also, my alternator was not directly earthed via the Earth Screw on the side of the housing...should it be?

I also having trouble tracing the wiring from the VDO Tacho to the rear of the car. As the car was running EFI with a Wasted Spark coil setup, am I correct in assuming that the Tacho would have been connected to the Alternator in order to get its "pulse"? If so, could the tacho therefore be connected somewhere behind the dash?

Thanks
Regards
Greg

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Anthiron The Baja Rejuvenation Begins

4,936 posts · joined Oct 2003 · 6 Apr 2013, 2:25 pm

#950277

Have a look here

http://www.vw-resource.com/alternator_wiring.html

62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom

Anthiron The Baja Rejuvenation Begins

4,936 posts · joined Oct 2003 · 6 Apr 2013, 2:30 pm

#950278

Oh and Tacho feed wire to - terminal on coil.

Tacho gets its pulse from Ignition system not charging system.

62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 · 6 Apr 2013, 4:12 pm

#950288

Thanks Nicko,

I was confused as I only had the wiring diagram page from the VDO Tacho and it shows that you can connect the Tacho to the Alternator and as the car did not originally have a standard coil, I thought that it was therefore connected to the alternator.

It appears that that is only able to be done on diesel engines.

Thanks for the link, I already saw it and basically wanted confirmation.

What about the question regarding "earthing"?

Regards
Greg

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Anthiron The Baja Rejuvenation Begins

4,936 posts · joined Oct 2003 · 6 Apr 2013, 4:38 pm

#950291

Ive never seen one earthed externally using that screw. Usually it is just left the way it is. The alternator is grounded and regulated internally.

Someone more knowledgeable may chime in here and correct me but AFAIK you will be fine without an external earth.

62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom

nils Fahrvergnugen

971 posts · joined Jan 2008 · 6 Apr 2013, 5:16 pm

#950296

never seen one earthed either, fibreglass fan shroud maybe?

Quit calling rust patina

Anthiron The Baja Rejuvenation Begins

4,936 posts · joined Oct 2003 · 6 Apr 2013, 6:09 pm

#950300

That would make sense.

62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 · 6 Apr 2013, 7:35 pm

#950310

Thanks guys....

pod i`ve got to finish this thing one day

4,980 posts · joined Dec 2003 · 6 Apr 2013, 7:42 pm

#950314

mines earthed i used this diagram

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