[V]

First off, run the remote turn-on to the radio, like it's designed to be. The kenwood will have a wire specifically for it.

Second, if you ever want to run power from the fuse box, the ONLY terminal safe to tap into are the ones labeled "Batt"(for full time power), or "IGN" for ignition activated. Any other circuit is designed only to handle a certain amp draw, anything extra can and usually does affect it negatively.

Once you have the fuse box unmolested, and free of splices, then and only then can you begin to properly diagnose or trace any short. Check to see if you pinched or penetrated any wires in the drivers side harness that runs along the side of the car to the rear while you were doing the install.