[Philly]

just to clarify on the power wires, i don't know if its just an OBDII thing, or a M52 thing in my case...
but when I said setup for a rear battery, i meant was the M50 motor setup for a rear battery in the 325 it came from, not your Ti.

Id have another look at the power/grounds.

The 3 power wires I had were -
A) starter
B) main and cabin functions (so it seemed anyways)
C) and then the one I had grounded by accident seemed to control the DME functions, like fuel pump, spark, etc.

If its got any RED on the wire at all, its power.