Bought a toad finally and now checking the SeaView's trailer light connections. There is a round, six pin connector mounted in the bumper ... possibly a factory original.
Only four of the six pins have wires attached ... a ground, running lights, left/brake and right/brake. When I test with a voltmeter, the running light tests fine, and the brake lights alone test fine, and the left turn signal tests fine.
The right turn signal seem to be messed up. The right turn signal puts a flashing 12V on both the right turn pin and the left turn pin. Similar when brakes are added.
Since the RV has separate brake and turn signal lights, there must be a tail light converter box buried somewhere to get the trailer wiring down to four wires. I'm suspecting the converter has failed. Anyone know where it might be hidden? Or any other tips?