451M

a universal door lock relay assembly designed to simplify power door lock integration for aftermarket alarm, keyless entry, and remote start systems. Commonly used with Viper, Python, Avital, and other Directed Electronics systems, the 451M provides reliable door lock control for vehicles requiring external relays.

Features & Benefits

• Pre-wired door lock relay assembly
• Simplifies aftermarket alarm and remote start installations
• Includes dual built-in 40-amp relays
• Compatible with most Directed Electronics systems
• Supports power door lock systems drawing 30 amps or less
• Includes resistors for select newer vehicle applications
• Compact design for easier installation
• Ideal for negative pulse door lock integration
• Reduces installation time and wiring complexity

Specifications

• Product Type: Door Lock Relay Module
• Model: 451M
• Relay Capacity: Dual 40-amp relays
• Compatibility: Universal vehicle applications
• Operation Type: Wired
• Trigger Requirement: Alarm-supplied momentary negative pulses
• Application: Power door lock interface
• Installation Type: Hardwired
• Color: Black

Installation Applications

The 451M is commonly used when installing:

• Remote start systems
• Keyless entry systems
• Vehicle security systems
• Power door lock actuators
• Aftermarket alarm systems

It is especially useful for vehicles requiring external relays to properly interface with factory door lock circuits. Some installations may require one 451M module or two standalone relays depending on the vehicle platform.

Compatibility

Designed to work with many Directed Electronics brands including:

• Viper
• Avital
• Python
• Clifford
• Automate
• Other DEI systems

Additional Details

The pre-wired design helps reduce installation errors and speeds up installation time for professional installers and DIY enthusiasts alike. The included resistors also assist with integration on select newer model vehicles.