User manual DEI 300

[. . . ] Model 300 Installation Guide © 2000 Directed Electronics, Inc. Vista, CA N431R 3-00 Downloaded from: http://www. guardianalarms. net table of contents What Is Included . 3 Primary Harness (H1), 12-Pin Connector . 4 Starter Kill Harness (H3), 2-Pin Connector . [. . . ] TWO-RESISTOR TYPE: If two resistors are used in the factory door lock switch/key cylinder, the switch/key cylinder will read less than (+)12V in both directions. DETERMINING THE PROPER RESISTOR VALUES: To determine the resistor values, the door lock switch/key cylinder must be isolated from the factory door lock system. For testing, use a calibrated digital multimeter that is set to ohms. IMPORTANT: To ensure an accurate resistance reading, do not touch the resistor or leads during testing. Cut the output wire from the door lock switch/key cylinder in half. Test with the meter from the switch side of the cut door lock switch/key cylinder wire to a reliable constant (+)12V source. Some good constant (+)12V references are the power input source to the door lock switch/key cylinder, the ignition switch power wire, or the (+) terminal of the battery. Operate the door lock switch/key cylinder in both directions to determine the resistor values. If the multimeter displays zero resistance in one direction, no resistor is needed for that direction. Once the resistor value(s) is determined, refer to the wiring diagram for proper wiring. 18 © 2000 Directed Electronics, Inc. Vista, CA type H: negative (-) multiplex The system is most commonly found in Ford, Mazda, Chrysler and GM vehicles. The door lock switch or door key cylinder may contain either one or two resistors. SINGLE-RESISTOR TYPE: If one resistor is used in the door lock switch/key cylinder, the wire will pulse ground in one direction and resistance to ground when operated in the opposite direction. TWO-RESISTOR TYPE: If two resistors are used in the factory door lock switch/key cylinder, the door lock switch/key cylinder will read resistance to ground in both directions. DETERMINING THE PROPER RESISTOR VALUES: To determine the resistor values, the door lock switch/key cylinder must be isolated from the factory door lock system. For testing, use a calibrated digital multimeter that is set to ohms. IMPORTANT: To ensure an accurate resistance reading, do not touch the resistor or leads during testing. Cut the output wire from the door lock switch/key cylinder in half. Test with the meter from the switch side of the cut door lock switch/key cylinder wire to a reliable ground source. Some good ground references are the ground input source to the door lock switch/key cylinder or the battery ground. Operate the door lock switch/key cylinder in both directions to determine the resistor values. If the multimeter displays zero resistance in one direction, no resistor is needed for that direction. [. . . ] The only way to reset NPCTM is for the 60 minutes to pass, without a trigger, or for the ignition to be turned on. This allows the system to be repeatedly triggered, disarmed and rearmed, and still allow NPCTM to bypass a faulty zone. When disarming the system, 5 chirps indicate NPC is activated. The LED will report the zone that has been bypassed. [. . . ]