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04-20-2026, 10:31 PM
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#1 |
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The Machinist
Drives: 2012 2SS/RS LS3 IBM silver rally Join Date: May 2012
Location: Norman, OK
Posts: 404
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color of negative coil pack wire?
I have done some research but i have not found a definitive answer so...
When you pull the sleeve back which color is the negative wire that sends the tach signal? I am installing a shift light is why i need to know. TIA NC
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American Racing Headers w/high-flow cats and x-pipe, Flowmaster American Thunder Axle-back mufflers, VMAX ported throttle body, CAI intake, ADM race scoop, RX Catch Can, PEDDERS Street Z package-ZL1 sways-XA Coilovers, PFADT trailing arms-toe rods, RPM 3:91 gears, RPM Stage V Trans, ADM diff bushings, tune by ADM, and still bustin' knuckles!
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04-21-2026, 08:23 AM
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#2 |
         
Drives: 2010 Turbo LS3 Join Date: Dec 2009
Location: Palm Bay, FL
Posts: 3,065
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I used the purple wire next to the pink one. There is a thread or two on here somewhere that explains you can't use tach wire because it's a square wave and MSD sells a box to convert it for tach lights. I used that purple wire off the #1 coil and it worked for my NX controller. My guess is pink is the hot and black is the ground, but those did not work for me.
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2010 SS - Kind of an On3 kit, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1 brakes.
2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. Gen6 ZL1 brakes. |
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