Thank you both - I'm guessing the previous owners (a very large family of rats) did more work behind the dashboard . After 6 months I'm still finding poop where I least expect it !

Still trying to get my head around the circuitry without unraveling the loom - would the black wire here at the fuse box be a direct connection to the positive on the horn. I've tried a circuit tester but there was no reading so I suspect not (or else it was gnawed)

I guess, what I'm trying to ask is how to trace the purple/black electrical wire that leads from the indicator stem as I'm not sure how that gets to be the black wire that connects to the actual horn.

Out of curiosity - could anyone tell me what those 2 unmarked switches do ?

Last edited by DaiBach; 01/11/21 05:09 AM.

1974 4/4 2 seater