Thanks for that insight. But my assembly seems to be in fine shape. I mostly suspect it is the stubborn friction of the aluminum spring contacts - but still I remain baffled as to why I tried dozens of times to rotate the bulb holder in - but it refused to grab hold every time... UNTIL I added a dab of dielectric grease.

I also think the Volvo instructions are mostly non-existent - and once you take the bulb holder out, you soon forget which spring is supposed to go onto which contact. So it takes what ought to be a simple task and made it a frustrating PITA for me...

I kept wondering if I had it in wrong - but no matter which direction I held it, it refused to sink down into place. I went to my computer and searched Google and the brickboard - didn't find anyone else with the same problem. I noted on the 940 manual it says 'turn the assembly 1/4 turn clockwise' and sure enough tried that about 15 times. To no avail.

But now I know better - and I'll never put in another springed bulb holder without a squeeze of dielectric grease!