clock runs when car runs

[Clef]

1987 911 clock doesn't run with car off but does with it running. Runs when connected directly to 12 battery

[917_Langheck]

Welcome,

This subject has been covered numerous times in threads that can be found with the search function.

Likely tired capacitors, but other issues may be part of the equation.

[gptom]

could be hooked up to a fuse that is not on all of the time