Simplify your Peterbilt truck’s engine swap with the Kustom Truck Power Adapter Harness, a direct-fit solution for connecting the main engine power feed from the engine control harness to the OEM pigtail at the chassis load center on trucks with NAMUX3 electronics. Commonly used when replacing a Cummins engine, which draws fused ECM power from the chassis load center, this harness interfaces the J142 breakout on Kustom Truck’s engine control harness to the pigtail hanging from the firewall-mounted chassis load center, ensuring reliable ECM power delivery. Designed for Peterbilt heavy-duty class 8 trucks (e.g., 389, 388, 367) with NAMUX3 electronics (typically 2011 and newer), this harness enables seamless integration for a fully functioning dash and engine system as if factory-installed. Ideal for mechanics and fleet owners performing engine conversions, this harness supports custom builds and fleet upgrades. Note: This harness is only compatible with Peterbilt NAMUX3 electronics chassis, typically found on 2011 and newer heavy-duty class 8 trucks (e.g., 389, 388, 367); if uncertain of your chassis electronics, contact Kustom Truck for fitment confirmation. Upgrade your Peterbilt truck’s engine power system with Kustom Truck Parts’ precision-engineered power adapter harness, trusted for quality and reliability.
Kit Includes:
- (1) Power Adapter Harness
Key Features:
- Direct-fit power adapter harness for Peterbilt trucks with NAMUX3 electronics
- Connects J142 breakout on engine control harness to chassis load center pigtail
- Commonly used when replacing Cummins engine with Caterpillar, Cummins, or Detroit
- Compatible with 2011+ Peterbilt heavy-duty class 8 trucks (e.g., 389, 388, 367)
- Ensures reliable ECM power delivery for factory-like dash functionality
- Supports engine swaps and fleet upgrades
- Confirm chassis electronics compatibility with Kustom Truck if uncertain
- Ideal for custom builds and engine conversion projects
Upgrade your Peterbilt truck’s engine integration with Kustom Truck Parts’ direct-fit power adapter harness, trusted for quality and performance.
