"Can you help me fix the wiring on my old trailer?" #%@%^*$_!*#^$*# yeah

My uncle showed me a neat way to do the tail lights. Use a 16 ga extension cord. 3 wires 1left 1right and 1running lights. An make sure you have good grounds everywhere you need them. You can tie in the side lights at the end or at the side.
The ground thru the plug and brakes and the breakaway use heavier wire.