Alan,

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Thin horrid plastic moldings, no attempt made at keeping the guts dry. Cheap, thin pressed tinplate receps and the worst bulbs I ever saw- I actually dented the bayonet caps trying to fit them!

I know exactly what you mean. Some of those "el cheapo" trailer lights are complete junk.

I've seen some which even from new seem to produce very dodgy connections to the bulbs. Give them a few months of English winter, and it's not surprising the number of trailers we see driving around with dim/flickering/non-functioning lights. [Linked Image]