98 Hatch 3bar map install

[DOHCturboguy]

hey guys..

as u guessed im installing a 3bar GM map into my 98 Hatch.

as ive seen the wiring diagram that hondata supplies does not correspond with my situation.

A - GROUND - Green/White
B - Map Signal - White
C - 5V - Yellow/Red

I have the green/white and yellow/red but no solid white. The 3rd wire i have is red/green.

stock map:
i tested with a voltage meter and when i used red/green as white i got a negative Voltage reading. i swapped them around and got about a 1.5V reading. I then grounded the neg to the body and touched the positive of the meter to each wire resulting in a 12.5V reading.

I'm at a loss.. anyone else on here with a 98 civic 3bar install please tell me what wires are what.

thanks!