Originally Posted by robertel
In my right rear light assembly there is a yellow wire which I cant match up to anything. Does anyone know what this wire is for?
Yellow was used for back up lights by Airstream for trailers made to sell in Canada according to my Service Manual. You might check that lead.
It's easy to test all the wires by only powering one wire at a time. I've replaced and repaired anything on my 12 volt
system so far with a multi-meter, a small battery charger, a jumper light, and a 7-way tester for the towing connection. I'd go to the 7-way and power one wire at a time and see what it takes to make that yellow wire hot.