More Questions...

[southern_tango]

Help ,please one more time,when i was looking some cable to connect the ilum of my boost gauge(with my homemade pod..it's not going to win any prize but at least do the job),I discover that bunch of cables(yellow),with a couple of connectors(red) under the dash /steering wheel column is that factory?Should the black box(green)come holded by zip tides?

[MyStag260]

If its an electric boost guage its possible that is the controller for it... Mine looks similar and the circled things in red could be either incable fuse holders or just connectors, hard to tell though. Do you have any kind of boost controller or aftermarket alarm? as it could aslo be the control box for that.

Cheers

[Xmetal]

The black box with the pinout diagram could be an immobiliser...

With your wires that you've circled with red - stick a multi meter on the end and try turning on your headlights, ignition, etc and see what happens, other than that i'm out of ideas as well.