Hi guys, please help... trying to get a wiring diagram for my engine ecu. i have a 1999 gc8 and just need to check the wiring as i seem to have a lot of 12volt feeds but 1 earth. the car is doing all sorts of weird things so need to start there. the ecu is an E3 with 3 rectangular plugs blue, grey and black. i would really appriciate any help.
cheers