JB05177- Thank you so much for the simplified ampmeter electrical drawing posted above. I am in the middle of the last of extensive rewiring upgrades to 6997 and have had a few commissioning isolation gremlins - I think this simplified diagram has pointed me in the right direction to sort one of them out. Most appreciated.
Note to self - don't take a fully disassembled wiring harness , perform every upgrade known to man or beast and expect it to work first time .....!