St9120U Wiring Diagram. Web take the black wire on the st9101 wiring adapter and connect to the l1 quick connect terminal on the st9120b,u. Also on the circuit board the led flashes so i know something isnt right. St9120u Wiring Diagram Complete Wiring Schemas from wiring89.blogspot.com St4 & st5 wiring kit (ae0211) www.nickygrist.com. Well, someone […]