If only mine were that easy.
I deluged the plug and socket in electrical cleaner to no avail.
I then discovered the "Open Boot" lamp on the dash doesnt come on - well since I purchased the Evo back in July I never knew the warning even existed.
Now with the plug removed on the lock assembly, I looked for an earth potential on both pins ( lamp and warning ) on the boot assembly ( not the plug)- nowt
With the boot open of course.
Now if I earth the relevant sockets on the cable plug both the lamp and warning light come on !
ie the boot lock is faulty
Looking on Ebay and my local Fiat dealer this is going to set me back about £28 - £30