Duetto Clock

Hi Everyone 
Can anybody help me please
My 1994 AutoSleeper Duetto’s Clock is playing up
Sometimes it works sometimes it doesn’t 
Do Any of you Brilliant people have any ideas how to fix it 

I will be most grateful for any suggestions 

Cheers Heather 

If this is the type of clock with the small battery inside it check the battery contacts are clean, often just removing and refitting the battery will restore electrical continuity. The  jiggling due  to our potholed roads comes free. 

Thank you for your reply.
No it's not got a separate battery it runs off the main battery but thanks for the input.
It's an old type (not sure if it's an original clock) with a stick coming out of the centre to change the time.
Can't find a similar one anywhere on all the transit/motorbike sites...Its a Mystery...

Have you checked the wiring for any loose connections?

If it's a non-standard clock then posting a picture might help someone with the same one to advise.

I am into classic cars and the central adjustment indicates it has continental origins.  Check there is 12V arriving. .A simple !2V  neon screwdriver with a probe  and a  wire to earth is a very usefull cheap diagnostic tool for older auato electrics.   Professional repair is very expensive. Much easier to replace it with a modern battery operated type of same diameter. The battery needs changing annually.