Headlights not working

My dipped beams won't work.
High beams on even with switch to 0.
They go off when I switch to sidelight. I've changed switch, checked bulbs, fuses, ECU. Everything seams okay, but zero volts at headlight plug. I need help tracing wires through engine bay. Also when checking lights fuse etc, the battery drains very quickly even just after charging up on charger.