Recently replaced the nearside sidelight and when I tested the new bulb it didn't work. Not a problem, I thought, I'll try another 501... that didn't work either.
Turns out no other bulbs worked in that slot and the nearside taillight is now out and doesn't work when I replace that with a new bulb too?!
Any idea as to the cause and solution? I'm stumped. The brake light and headlight still work as they should.