is that my old harness?? must be....that whole harness plugs into the glow-plug ECU I'm pretty sure, there are a few other small plugs taped up in the same harness that are for coolant temp gauge etc...but I'm pretty sure that main plug is for the ECU.

I'm not sure if your who I sold me glow plug harness to (it's been a long time), but I sent the ECU with it...