420A 420a ECU pinout help

[imaracer83]

Hey guys, thank you for the loads of information that you guys post here for us to read. I'm installing a turbo setup on my 420a and am having difficulty locating the correct pin for the engine ground. There's pin 50 which is ground, pin 10 which is ground. Just want to make sure I splice into the correct ground for the auto timer. Thanks for any help offered.

 

[92AWDHX40]

2GNT.com - index

 

[imaracer83]

Ok guys, since you've all been so cool and helpful, here's something I'm having MAJOR issues with. Finding the pinout for a 99 gs 420a sucks. Hooking up the timer (apexi), they sent a diagram for every engine pinout except for the 420a. Does anyone know which ECU pins are for O2 signal and which is for engine ground? Getting a headache on this one guys. And the 2G site stops at 98.