Here are a two common questions about trailer wiring and their answers.
*wiring harnesses information may differ by wiring brand*
Where do the points on the harness plug go?
4 Way Plug
Yellow - left turn/stop
White - ground
Brown - running lights
Green - right turn/stop
7 way plug
Brown - running lights
Red - auxilary
Green - right turn/stop
Middle - back up lights
Black/blue - electric brakes
White - ground
Yellow - left turn/stop
How do I test to see if my 7 way plug is working?
Grab any conductive two pronged tool and insert it into the top two terminals on your 7 way plug that are your 12 volt and running light terminals. If your lights turn on, your fuses are good, your battery will charge and your lights work.
Where can I buy a replacement 5amp trickle charger and tester?
Etrailer has one online here https://www.etrailer.com/Battery-Charger/Bright-Way/BRW77FR.html
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