16144288 TBI ECM upgrade to 16168625 TBI PCM

[dave w]

Dave:

You are correct, my '92 S10 has an ESC which I found and verified the two wires--Dark Blue from KS and Black ESC to B7--which I need to join to make a direct connection from the single KS to the old B7. What function do the other two wires--Pink/Brown and Brown--connect to or serve?

One wire is ground, the other is ignition power (on / start). I don't remember which is which.

dave w