Possible Cause: Possible short in wiring.
Action: Check wiring to be sure no power wires (red, yellow, blue, or blue/white) are touching metal.
Possible Cause: Possible incorrect fuse.
Action: Check that fuse has a 15 amp rating.
Possible Cause: RetroSound radios will work in negative grounding vehicles only.
Action: Check vehicle for correct negative grounding system or verify battery is installed correctly.