Mobile Alert Proximity Intrusion Sensor (490-0640) Wiring Faxback Doc. # 32630 CONNECTING THE SENSOR TO YOUR ALARM SYSTEM 1. Connect the red wire to a constant 12-volt source. 2. Connect the black wire to a metal part of your vehicle's chassis or directly to the battery's negative (-) terminal. 3. Connect the brown wire to the alarm system's pin switch input. For most Mobile Alert systems, this is the brown wire. The following list shows the correct terminal on other Mobile Alert Systems: CATALOG TERMINAL NUMBER NUMBER 49-491 "IN" 49-791 2 49-795 12 49-796 12 (IR-05/09/96)