Winnebago Journey Owner's Manual page 73

The diagram below shows proper connection
of trailer or tow vehicle wiring to the coach light
system. To access the wire connections inside the
plug, remove the small screw near the end of the
plug and slide the contact assembly out of the
barrel.
TM = Tail lights
GD = Ground
LT = Left Turn
RT = Right Turn
S = Brake lights
A = Backup lights
SECTION 6
ELECTRICAL SYSTEMS
6-11