Hi Ken,
In my experience these things are bl**dy awful for wires chafing around PCM and FCM.
I had a complete non-runner with a high resistance supply to the PCM. Found a corroded wire beside/below the nearside headlamp.
Had another with intermittent headlamps and other problems which turned out to be a chafed databus wire which was shorting to earth.
My suggestion would be to have a good look around this area. You will almost certainly need to remove air intake, battery tray and possibly headlamp for a proper look.
HTH Shaun.