65 dart turn signal wiring question.

update on right turn signal...i have looked at the wiring diagrams but cant find what iam looking for the tan wire the goes to the right front has a short somewhere...at the plug for the turn signal switch coming from the wiring harness there is two tan wires that are hooked togeather at the plug...one is the right front signal...i cant find in the wiring diagrams what the other tan wire is for,,,diagram only shows one tan wire at the plug any ideas will be helpful