Since we are talking about "non concourse", thought I'd add this..learned from Bjorn many years ago, did both of my 'birds with them, tail lights not working have been non issue since... readily available from local parts store
glad you did Kel...they staty grounded and stay in place, never fall out!
But what if the housing it goes in to offers a poor ground? I was going to try crazecars method of adding a ground wire circuit to all the sockets by scraping off the plastic.