Hey All,

Need a hand figuring which one is the ground wire.

According to Aaron, it is the brown/black one on 86-88.

However, I have a brown w/ white line and some black marks and a brown w/ red line and some black marks.

I have detached Pin D in the diagram from FSM Chapter 4A - 73.

Attached are pics, let me know which one I am suppose to detach.




Thanks,

Wilson

 

https://www.rx7club.com/showthread.p...rness+question , scroll to the diagrams in the bottom post.

What year is the car? Wiring colors changed in 88 (or maybe 87 1/2?) for the pressure sensor. The ground wire goes to pin 2C. It should simply be black on an 88.

 

IF there is a pure black wire, that is the gnd wire.

Brown/white...........NO

Black/White...........NO

BROWN/RED...........NO

There is only one wire left........it's either pure black or brown/black and is the gnd. IF you look from the WIRE side of the plug, the gnd wire in in the top row, far right.

Wiring diagrams and how to use them is available for free on this site.

 

Thanks everyone, would've grounded other components without your help =)

 

uh yeah i tried regrounding the pressure sensor on my 88 a couple years ago, but I grounded the black/white wire and it blew an EGI fuse and melted the insulation on that wire. I ended up just replacing the harness after that, it was already pretty messed up.