I have 2 switches - one does front work lights/ interior / gauge light etc - the other one does rear work lights only. Sometimes they work sometimes they dont but when they work both circuits work and when they dont they both dont. Fuses are good. Im going to get new ones anyway but... Does the light circuit share a common ground ? Its frustrating because I have the back up cam wired to rear tail lights so I need to have lights on for it to work. If anyone has a schematic for the B machines that wants to share with me I would be grateful Thanks