You are right there, but thats exactly what the dealer has been doing, and the weird thing is the parts they swap with their demo cars never fault, so I guess we have not got to the fault yet.
I suspect a bad connection like you said Rampage, ar a dodgy earth somewhere.
It isn't actually wet in the engine bay but the dampness in the air that seems to trigger it, especially as the weather turns toward rain.
Anyway, I feel my nightmare is distracting us from H8T WP's trouble
...how are you getting on, mate ?
Did you get it sorted yet ?