Hi - I'm trying to install a CD, AM/FM radio in a boat. I've checked the voltages - they're good. I hook the positive to the red and yellow wire, and the negative to the black wire. Doesn't turn on. Checked the fuses - they're good. Tried the radio on a bench 12v power supply and my car battery - still doesn't turn on. Bought another radio at walmart and it doesn't turn on either. Either I've got two bad radios or I'm wiring this thing wrong. Any Suggestions?

Thanks - That's excellent advice. Finally found the problem - On the first radio, it's probably a bad radio. On the second radio that I got at Wal Mart - I didn't have the wiring connector pushed all the way in and locked. I went back to the first radio and checked that solution and that wasn't the problem - so that one goes back to Amazon and the Wal Mart radio goes into the boat.

Thanks for the help Thanks - That's excellent advice. Finally found the problem - On the first radio, it's probably a bad radio. On the second radio that I got at Wal Mart - I didn't have the wiring connector pushed all the way in and locked. I went back to the first radio and checked that solution and that wasn't the problem - so that one goes back to Amazon and the Wal Mart radio goes into the boat. Thanks for the help