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The Universal Theft Deterrent (UTD) System is designed to sound the horns and flash the exterior lights when the system is armed and entry is gained forcibly through the doors or trunk. Alarms Operation of the exterior lights and horns when activated, is controlled by the Theft Deterrent Module via the Theft Deterrent Relay. Fuse B3 applies voltage to the Theft Deterrent Relay’s coil at all times. When the alarm is active the Theft Deterrent Module cycles the alarm system control driver (terminal F) on and off once per second. During this cycle ground is applied to the Theft Deterrent Relay coil and then removed. This causes the relay to energize and de-energize. The relay contacts will now cycle open and closed at the same rate as the alarm system control driver. When the Theft Deterrent Relay’s contacts are closed, the Horn, Park Lights, and Headlight Relays are grounded through the Diode Pack, and CKT 624. The relays now energize and the relays respective circuits will turn on. The Diode Pack is installed in the circuit to provide circuit isolation. If the diode pack were to short some unusual symptoms might occur such as the headlights light when the horn is sounded. Arming Arming the Theft Deterrent System is a four step procedure. The arming sequence begins when the ignition is turned OFF. This removes battery voltage at module terminal K, the ignition 1 input. Step 2 occurs when a door is opened and ground is applied to module terminal J, the tamper input. The system is still not armed so grounding the tamper input at this time does not set off the alarms. The SECURITY indicator flashes to alert the operator the system is not armed. Step 3 occurs when the doors are locked electrically, this applies battery voltage to the module’s terminal G, the system arm input. The SECURITY indicator is on steady to indicate that the system is armed. The arming sequence is completed when all doors are closed, removing ground from the module’s terminal J, the tamper input. The system is now armed. The SECURITY indicator will remain on for a few seconds. The Remote Keyless Entry (RKE) System can also arm the Universal Theft Deterrent

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