Dummy's Guide to RV Wiring

Wiring the 4 pole utility trailer plug
4 pole plug

Pin locations for the flat four pole plug

4 pole flat RV plug
# Wire Color Function Location - Truck Location Trailer
1 White Ground uncovered pin covered pin
2 Brown Running Lights 1st covered pin 1st uncovered pin
3 Yellow Left turn/brake light 2nd covered pin 2nd uncovered pin
4 Green Right turn/brake light 3rd covered pin 3rd uncovered pin

Click here for a printable wiring chart

4 pole round plug

Page One

Page Three