Technical Marea Blowing fuses

[Ceymore]

Hi all, I'm in need of help. I have a 1.8 Marea Weekend with one problem, every so often after anything between 4 hours to 8 hours running it blows the engine management fuse and cuts out, replace the fuse instantly and it's back to normal.
I have had two'auto electricians' investigate but to no avail,as nothing ever happens during the investigation and nothing shows up. I'm looking for a wiring diagram for the 1.8 but can't seem to find one, its quite different to the other models and has a different engine management system (hitachi)
If anyone can help with the whereabouts of a wiring diagram or even help with the problem, I would be most grateful.[8D]
Cheers
Cliff
Good Site by the way

 

[mad_colm]

doesn't the haynes manual have a diagram for the bravo HGT, that's the same engine.

Met Cognac 99 Brava 100 HSX, wish it'd clean itself!