Page 1 of 1

Wiring a Mallory 685 box to MS 2 V3.0

Posted: Wed Apr 07, 2010 8:45 pm
by jay_rich
I would like to wire my mallory 685 box to my MS2 V3.0 since I ue the window switch to control my meth nd 2nd fuel pump.

This is a 8pin GM HEI Dizzy with an external 2 wire coil.

Now the mallory has..

Yellow-Coil+
Black-Coil -
Green-Trigger
Red-IGN power

I know the yellow and the black will go straight from the mallory box to the coil, but where do the the green and red get spliced into?

Sorry its been a while since I have wired my mallory box to my old PCM. It is hard to find directions without using a mallory adaptor.

Thanks

Jay

Re: Wiring a Mallory 685 box to MS 2 V3.0

Posted: Thu Apr 08, 2010 4:09 am
by Matt Cramer
Wire it up exactly like you would do on a stock HEI equipped car. If you don't have the diagram for it, I suspect green goes to the wire that the HEI module would have connected to the coil negative, and red goes to the wire previously connected to the coil positive.