CDX-RA700 will not get power from my Honda Civic

Automobiles use Direct Current "DC" and is very dependant on a good ground. The black wire from your stereo should be the ground and needs to be attached to the chassis "metal part of the car". You can use an ohm meter to check for grounds by placing one lead on your door hinge (unpainted) and the other to where you are connecting your ground from the stereo. Be sure that this wire does not have voltage on it with the key off, on acc, or in the on position or you could blow a fuse or damage your equipment. Besides that make sure that you have 12v constant to the (usually red wire) and switched (voltage only with the key on) to (usually the yellow wire). Hope that helps. It's mostly about the ground.