sorry i feel like im being very bothersome since im constantly asking questions sorry but i was wondering on the MS2 V 3.57 main board i have looked at the schematic for it and looked at he main board itself and in order for me to connect my zeal board to main board one of the connections require the zeal to be connected from zeal 12v to main board S12 and there isnt an S12 unless its JS12 and also cant find SG also can anybody tell me where they are please and thanks.

 

Here are the instructions for the Zeal for reference:
http://www.diyautotune.com/tech_arti...d_assembly.htm

Here's the power section schematic of the 3.57:
http://www.megamanual.com/357/V357_schenmatics6.gif

S12 is just a clean 12V connection. It connects to the cathode of D11 so it's going to be on the side of the board with the DB37, right near the group of SPR pads.

SG is just a "Signal Ground". To the left of the CPU, just below the boot jumper you will find pads for SG and 5V.

Here's the board diagram:
http://www.megamanual.com/357/V357_silk.gif

 

oh ok thanks alot aaron now i can finally finish this megasquirt