Got a a new undertail. Know a bit about LED's. Got wiring done on undertail. All tested, done correctly. Grounds are good.
Also wired in some front LED's.
Signal switch left = left front and rear signals light...right rear dimly also flickers.
Signal switch right = rightfront and rear signals light...leftrear dimly also flickers.
Re-check'd grounds. All good.
Brought LED flasher in from work, does not work with Yammie harness.
Ordered Yammy LED relay, also pair of resistors just in case (have heard of sometimes needing one or the other or both, so why not have both on hand).
Any other ideas?