There are 2 wires on the VOES.1 goes to frame ground and the other to you ECM.Put a VOM across the 2 legs,it should show Open,no continuity.Apply a vacuum and it should go Short.If you have a vacuum pump with a gauge on it the switch should activate at 5-7 in. of vacuum per manual(95-96 Touring). Jack has you covered with the links.
tourbox