Intermittent indicator

For the last couple of weeks (fortunately just after the MoT), the left indicator has become intermittent. It's as if it's not receiving power. It used to be that I could jiggle the steering wheel to get it working, but for a few days last week, it refused to operate at all. The right is working perfectly.

I don't have an exploded diagram of the indicator mechanism, but am I right in thinking that the circuit is completed when a contact is pressed against a live source? The problem seems to occur mostly when the car has been left in near-zero temperatures overnight.

Thanks for your help!

jerry

do the haxards all work - if so then the relays, fuses & bulbsa are probably OK and it's likely to be a problem with the indicator stalk.

CHeapest option is to remove it from the steering column and give the contacts a good clean either with really fine wet 'n' dry or contact cleaner spray. If that doesn't sort it then a replacement is needed