| Nick,
I recently had electrical problem, basically no lights or fuel pump etc when you turned on Ignition, traced fault to main relay which was a soggy mess inside.
The relay is amongst the cluster at lefthand side of the battery - small one is fan, large one is flasher unit and the main relay is the middle size one which on my bike is has a yellow case.
Don't know the cost of ducati one but I guess approx £5 - I have temporarily fitted one from Maplins cost £1 but you will need to make a link.
I recommend that this relay and all the others are made watertight with sealant of some kind
Martin. | 
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