Hello, I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
Hi Shantal, I can wait 24 hrs from now as after that it will be to late for me, I can also tell you it`s a merc 720.110, the gearbox were put in cars around 1970`s-1980`s, hope this makes it a bit more easier for us both, thanks Dave.
Hi billy like you I thought the single wire was reversing light sensor but lights work with it connected or not so not sure what it is only got till 5pm Tuesday to sort it will be near a computer or just outside at the camper so can keep checking for your answer thanks David