When I start the truck or turn the key over, radio should work. Has Pioneer radio so I check the wires and only way the radio comes on is if I put the red and yellow wire together. But when I do that, it doesn't save my memory. What's the problem?

Thanks!

 

Reason for radio not turning on your not getting constant power to the radio , the memory problem is maybe the Radio Fuse or Accessory Fuse check those