Problematic Rear Light

[WiffDogg]

My Left Side Rear tail light is inoperable even after changing bulb, cleaning all connections etc. The other lights (Brake, directional etc) are fine. Right side is OK. Any thoughts to troubleshoot?

[Northern]

Grab a multimeter or test light and see where the power (or ground) stops. Bulb socket, bulb holder connector, etc. It's probably localized to one of those since the other works.

From there, into the ETM to find where the wiring goes

[WiffDogg]

I'll try that but the challenge is the entire housing with the bulbs needs to be plugged into the taillight assembly for the connections to work so it is hard to get to the contacts at that point. Right??

[Northern]

I think the physical connector can unclip from the rest of the bulb holder?