Retrosound radio won't turn on
 

I purchased a retrosound radio for 72 Chevelle. I hooked the yellow wire to constant 12V and red wire to ACC fuse in fuse box. Also black wire to ground. I have 12.55 volts from my battery,but cannot get the radio to turn on. Any suggestions?

Marco,
I have Retro Sounds as well. I am assuming you check to make sure you had power with a voltmeter on both locations.

A trick I do, is to use a set of alligator clips and long wires and will connect the the yellow and red directly to the battery positive and another wire from the ground to the negative. If it is still dead you might have to send it back.