Single Terminal Switch (8642569 & 8634475) & 2 Terminal
Switch (8642346) (Normally Closed)
On single-terminal switch, connect one ohmmeter lead to switch terminal and other lead to body of switch. On 2 terminal switch, connect one lead to one terminal and other lead to other terminal. Ohmmeter should read zero. Apply 60 psi of air to switch. Ohmmeter should read infinite.