VR BUICK COIL PACK WIRES + and - which wires???

[H1GHROLLR]

hey people i have a vr commodore buick V6 and im trying to work out which is the main

positive+ and the main negative- out of all the wires that connect into the coil pack via the

harness , does anyone know what colour/s etc ????

[Brett_jjj]

This is for a VP.Im pretty sure they are similar..The main wiring that goes to/from to the DFI module which sits straight under the coil packs are.Red=the main 12v power feed.White/Violet=ECU.Black/Red=ECU.White=ECU.Tan/Black=ECU.Brown=Tacho.White/Black=crank angle sensor.Grey/Red=crank angle sensor.Blue/Yellow=crank angle sensor.Light blue/White =crank angle sensor.
And I think the DFI module is earthed through its mounting where it bolts to the engine block.Theres no negative wire in the diagram,unless it earths through the ECU somewhere.

[H1GHROLLR]

thanks for that info mate can anyone confirm where the main negative is for the coils

[H1GHROLLR]

maybe delco wizzard will jump in on this convo

[hako]

The VS wiring diagram indicates the DFI module earths thru it's mounting to the engine block as Brett suggested.