62 plate and the 24 volt in ashtray works, 12 volt in passenger well works but the 24 volt in passenger well doesn’t. any ideas. 
I would imagine they are linked, so if theres an in line fuse…check that, or it could just be knackered and needs replacing.
they are linked so fuse is ok,took cable off plug and checked that,its dead . bit stumped as to why.