Nothing works (by 6 users)

If this unit uses a switched power wire and a memory back up. usually onewire is red and the other wire is yellow. off of the head unit. but the car wiring uses two fuses for these wires. A lot of times thet will be mixed in with dash light dome light, or something like that. But there will also be a Radio fuse. But if one wire is not getting power it can case the unit to malfuction. I do not know what kind of car you drive. But different cars put fuses all over the place from under the dash to under the hood. Also be sure to check fuses on the unit itself.