After I got my 242, I found out the blinker assembly broke off (seems someone overtightened the screw and it broke off and was glued back on). Replaced it with a part from the boneyard, now it won't work. The upper light works fine, but when blinker or hazards are activated, it won't work. I crimped a new lug on the ground but that didn't work. Cleaned connections, no go. Could this replacement unit be bad? What should I look for and can this be fixed without having to go back to the boneyard.

tia

flasher relay behind panel at drivers right knee

Would be worth it to get even a $10-$15 electrical multitester (Volts/Ohms/continuity) to help you check this out.

There must be a break in continuity somewhere - hot source going to bulb, or the ground path from bulb to holder or holder to wire or wire to ground screw/body.

You can keep cleaning all connections over and over till it works - or you can use a tester to find where it's not working and clean that.

Possibly a wire break inside the insulation - though not that likely. A tester can find that, but that's one thing that repeated cleaning won't fix.