Originally Posted by Paul_P1

Hi Ed, how do you go about troubleshooting something like this, we're lost. If we take it to an auto electrician what do we ask him to look for? I found the earth behind the stereo was disconnected, we've cleaned all of the grounds. I noticed the earth cable from the ECU housing is missing, could this cause the issue, I'll try running an earth to it tomorrow. Sorry for the thread hijack btw.

Cheers,
Paul