I’m waffling at the moment because Electric Ian the Electrical Wizard is here. It didn’t take him long to discover the engine starter alternator’s
f*cked got a problem, even though it kept on working. That’s what the VERY LOUD buzzing noise under the control panel is all about – sending out a “distress” message!
Blimey, when he took the control panel out it was DEAFENING. Pardon? Say again?
Fortunately we’ve got a spare starter alternator (80 amp) so he’s fitting that now… Totally unrelated there’s also a wire somewhere that’s going positive — positive, rather than positive — negative like it should be. The latter isn’t a big deal, but he’s going to put that right too… Sometime later: