The amber light is almost certainly just a porch light
- amber because it attracts fewer bugs. From your description, I'm not sure whether that light itself is blinking red or you have an blinking red light on/near it. If it's the light fixture itself, the light it gives off should be amber and not blink. It could be that someone replaced the external bulb with the an LED that's blinking because it's going bad. I've heard that certain LEDs show up as red when they are put behind an amber lens, but I forget the specifics - maybe it was an amber light behind an amber lens that did it. If there's a separate red blinking light, I'm not sure what it would be. Taking a picture would probably help us identify it.
Does the receptacle you're referring to look like it would accept a 1/4" microphone plug
? If so, you'll probably find some identical ones inside, mounted on your ceiling or on the lights closest to your front/rear bunks. That's a 12v connector, typically used for bunk-end fan-lights.