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-   -   VDO Tach Question: Pin1,3,4 (http://forums.pelicanparts.com/porsche-911-technical-forum/409781-vdo-tach-question-pin1-3-4-a.html)

richemj 05-17-2008 05:50 AM
Can anyone tell me the wiring designation for Pin 1,3,&4 for a '73 VDO tach are? I can't seem to find a wiring diagram anywhere in past posts or on the internet.

Both the red and blue/yellow wires have 2 leads into a common female end for connecting with the tach. Pin3 was a single black.

http://i8.photobucket.com/albums/a37...ch_for_web.jpg

Thoughts?
Thanks!

richemj 05-17-2008 04:04 PM
Figured out the 37yr old wiring Gremlin. Works now. For those interested:

Pin1: Positive
Pin3: Tach Signal
Pin4: Negative

Here's how it looks installed:
http://i8.photobucket.com/albums/a37...tach_close.jpg


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