I have a Proform shift light I'm trying to install and have a couple questions. The instructions say RED=12V ignition switch, Black=good engine ground, Green=Tach terminal(for GM, HEI, MSD) or to coil negative (for standard ignition).
Where is the best/easiest place for my RED wire and where the heck does the green wire actually go? I didn't know we had a "tach terminal" on our cars. Can someone please fill me in. P>S...I posted in electronics as well.
Thanks

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Alex A. (aka chevyboy)
1992 Z-28 L98/1LE. Heritage Edition. SLP runners, gutted cats, SLP 3" cat-back & muffler. 3" flo-tech cut-out, SLP TB foil, K&N filter @ TB, 3.23 posi rear.

 

The tach terminal is on the distributer cap. Look at the cap where the harness plugs in to the bottom side of the distributer cap.There is a terninal connection marked TACH. You can run you red wire to the fuse box under the driver side of the dash.

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86 IROC T5
MSD 6A
Summit cam
Flowmaster
AFPR
Lowered 1.5"
My own prom