999 indicator problem

Hello everyone
Noticed last night, whilst fettling in the garage, I noticed that the RH front indicator is not working. Not the bulb, not the holder unit (swapped both from the LH side to check). All 3 other indicators are working. Before I start going into the horrible world of taking the LH bar controls and the switch mechanism apart and checking for cable continuity, does anyone have any ideas please?
Cheers, Ian.

Not heard that one before, a case of fault finding i’m afraid

Thanks for replying Martyn. I always dread taking those switches apart, putting them back together is always a blag. Time to get the multimeter out! Cheers.

Yes, not much else to do, too many variables for it to be known or common