Really strange wiring issue

[Crisgavin]

My name is cris. I have an 89 SOHC 240sx and when I turn the key none of the aux power (clock, windshield wipers, gauges, head lights dash, even seatbelts) will work. The only way to make them work is to rev the engine up to about 4 or 5k and the they all come on at once. Any help or suggestions would be much appreciated

[Jared.S]

possibly a loose ground and the vibration of the engine causes it to connect? idk man that's the weirdest wiring issue Ive herd in a while

[Crisgavin]

I have now discovered my headlights also suck my battery dry. So it's more than what I thought. Maybe no voltage regulation?