PWagon

I'm so close to firing up my LS swap, but I need some help. I need a ground wire to my PCM (blue #34) that grounds only when in Park and Neutral (otherwise OPEN). My truck is a 1986 K5 Blazer and has the stock park/neutral safety switch, but that thing is Greek to me. I don't even know if it's possible to get a Ground connection only when in Park/Neutral. Any ideas? Pictures would be appreciated.

loweredd

iTrader: (2)

It should be a piece of cake on the stock switch. Use a test light, and you should be able to find it easily.

PWagon

I guess I am answering my own question. If anyone of you guys are looking for the exact location of a GROUND ONLY when in PARK and NEUTRAL, then here it is. Use the Orn/Blk terminal on your park/neutral safety switch. Allegedly it only provides a ground (-) signal when in park and neutral.

ijimmy

use your original crank request wire directly to the starter