The Metra AXTRIG Universal Bypass Module is a compact electronic interface designed to simulate a vehicle’s parking brake signal for aftermarket multimedia head units that require this input to enable certain features. This universal bypass module supports both single-pulse and double-pulse ground outputs, ensuring compatibility with a wide range of aftermarket radios, navigation systems, and video receivers. Its simple, no-programming design makes it a practical solution for professional installers working on RVs, off-road vehicles, and show cars where accessing the factory parking brake circuit is impractical. The AXTRIG is best suited for experienced installers and custom vehicle builders who require a reliable and efficient bypass solution. KEY BENEFITS Simulates a parking brake trigger signal required by many aftermarket multimedia head units Supports both single-pulse and double-pulse ground outputs for broad radio compatibility Universal design eliminates the need for vehicle-specific bypass modules Simplifies installations by avoiding direct access to the factory parking brake wiring Compact housing allows easy concealment behind the dash or within wiring harnesses Improves installation efficiency for professional mobile electronics installers Ideal for RVs, off-road vehicles, and show cars with custom electrical layouts TECHNICAL SPECIFICATIONS Weight: 0.03 lb Dimensions: 8.00″ L × 4.00″ W × 0.50″ H Function: Universal parking brake bypass module Output Type: Single-pulse and double-pulse ground output Compatibility: Aftermarket head units requiring a parking brake signal Application: Universal Housing Color: Black INSTALLATION & COMPATIBILITY The Metra AXTRIG installs inline between the aftermarket head unit and the parking brake trigger input, providing the required signal without direct connection to the vehicle’s brake system. Its universal configuration makes it compatible with most aftermarket radios and multimedia receivers that rely on a parking brake input. The module’s compact size allows installation behind standard dashboards or within custom wiring looms. It is commonly used in RVs, off-road vehicles, and exhibition builds where traditional parking brake integration is not feasible. Installers should verify available dash space and system requirements before installation. FAQS What is the AXTRIG interface used for in car audio systems?The AXTRIG is a trigger interface designed to provide a reliable 12V output when an aftermarket radio turns on. It helps activate amplifiers or accessories in vehicles with data-controlled factory systems. Why do I need an AXTRIG when installing an aftermarket amplifier?Many modern vehicles lack a traditional ignition or remote turn-on wire. The AXTRIG safely generates a clean trigger signal, preventing amp turn-on issues and protecting your audio components. Is AXTRIG compatible with most vehicle makes and models?AXTRIG works with a wide range of vehicles that use data or CAN-based systems. Always verify vehicle compatibility before install to ensure proper triggering and stable system performance. Can AXTRIG be installed by a beginner installer?Installation is straightforward with basic wiring knowledge, but understanding trigger signals is important. For best results, professional installation or Metra wiring guides are strongly recommended.
