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MG MGB Technical - Wiring up a Rev Limiter - Help Needed

To EE types or Those Generally More Intelligent Than I am,

I am wiring up a new pertronix rev limiter and could use a little guidance. Here are the wiring instructions:

Red to Coil positive (easy)
Orange not used (easier still)
Yellow to Coil Negative (cruising along here)
Black to Ground (no worries)
White to Tach Output (huh?)

What is meant by "Tach Output"? Do they mean the WB that is the same as Coil Negative? Or do they mean the Green, which just eventually just runs around to Coil Positive (via a fuse and a voltage stabilizer). Am I missing something? Any enlightenment will be gratefully accepted.

Dean
('73-'74 N. American Wiring Diagram)
Dean Lake

Just for the archives:

It appears that attaching the white lead to the positive side of the coil is working. "Tach Output", I think, was meant to say the point where the wire that goes from the coil to the tach. That is the same as saying the coil positive (on our cars).

By the way, the rev limiter is very cool. It can be set to any increment of 100 and is considerably gentler than other, more abrupt types. This one randomly interupts sparks to different cylinders. I tested it several times this morning and only got one small back fire. So far, it looks like a winner (though the instructions could be better).

Dean
Dean Lake

This thread was discussed between 08/08/2003 and 09/08/2003

MG MGB Technical index

This thread is from the archive. The Live MG MGB Technical BBS is active now.