Electrical problems
 

I am having a problem with a 2009 Colt. The stereo, the interior light, and the remote locking have all stopped working at the same time. For a couple of days they worked on and off intermitently, all three items working or failing as a group. But now they have all stopped working. I'm pretty sure all three items are wired through their own individual fuses. All the rest of the electrics work perfectly. Any ideas?

grounding issue.