Adding a shock sensor to your factory alarm enhances your vehicle's security by detecting impacts or vibrations. This modification ensures that your alarm triggers not only when doors, hoods, or trunks are tampered with but also when the car experiences shocks, such as attempted theft or vandalism. Below is a comprehensive guide to help you install a shock sensor effectively.

What You Need to Know About Shock Sensors

A shock sensor detects vibrations or impacts on the vehicle's body. When triggered, it sends a signal to the factory alarm system, activating it. This feature is particularly useful for protecting against wheel theft, glass breakage, or physical damage.

Benefits of Adding a Shock Sensor

  • Enhanced Security: Detects shocks and vibrations in addition to door or hood tampering.
  • Cost-Effective: Works with the existing factory alarm system, avoiding the need for an aftermarket alarm.
  • Customizable Sensitivity: Allows adjustment to avoid false alarms from minor vibrations.

Materials Needed for Installation

  • DEI 504D Shock Sensor (or equivalent)
  • Micro2 Fuse Taps (for constant and accessory power)
  • Butt Connectors (18-22 AWG)
  • T-Tap Connector
  • 18 AWG Wire Spool
  • Ring Terminal
  • Optional: Toggle Switch for disabling the sensor

Step-by-Step Installation Guide

1. Locate the Trigger Wire

Identify the factory alarm's trigger wire. This is usually found under the driver's side kick panel. Use a multimeter or reference your vehicle's wiring diagram to confirm the correct wire.

2. Prepare Your Materials

Strip back insulation on wires as needed:

  • Red Wire: Connects to constant power in the fuse box.
  • Yellow Wire: Connects to accessory power in the fuse box.
  • Black Wire: Grounded using a ring terminal.
  • Blue Wire: Connects to the factory alarm's trigger wire.

3. Connect Power Wires

  • Use Micro2 Fuse Taps to connect the red wire to a constant power source and the yellow wire to an accessory power source in the fuse box.
  • Attach a diode between these connections if required for your setup.

4. Ground the Sensor

Attach the black wire from the shock sensor and relay to a ground lug under the driver's side kick panel using a ring terminal.

5. Connect to Trigger Wire

Use a T-Tap connector to attach the blue wire from the shock sensor to the factory alarm’s trigger wire.

6. Adjust Sensitivity

Mount the shock sensor under your dashboard and adjust its sensitivity using its control knob:

  • Turn clockwise for higher sensitivity.
  • Turn counterclockwise for lower sensitivity.

7. Test Functionality

Lock your car and simulate an impact (e.g., tapping on glass). Ensure that the factory alarm activates when vibrations are detected. Adjust sensitivity as needed.

Optional Enhancements

  • Toggle Switch: Install a switch inline with the ground wire to disable the sensor during specific conditions (e.g., storms or valet parking).
  • Additional Sensors: Consider adding glass break or tilt sensors for comprehensive protection.

FAQs About Adding Shock Sensors

    • Can I add a shock sensor without altering factory wiring?
      Yes, using fuse taps and connectors allows you to install without permanent alterations.
    • Will this void my vehicle warranty?
      It depends on your warranty terms; consult your dealer before installation.
    • How do I prevent false alarms?
      Adjust sensitivity carefully and test thoroughly after installation.

By following this guide, you can enhance your vehicle's security with minimal cost and effort while maintaining compatibility with your existing factory alarm system.