Fuses ok! relays ok ! front lights ok but no back lights !
For me was a broken wire at the midlle of the rear bumper.
Also is possible the wire connector to be rusty.
The black fat wire is made from 8 little wires: 3x black (ground), 2 x Red (tail lights), 2x Green + yellow(brake light), 1x Green+ red (right sight marker), individual attached.
In my project i soldered all black together then applyin some heat shrink tube , all reds together with heat shrink tube...and so on, and finaly applying alot of duct tape !
Cheers!
