Upgrade your Peterbilt truck’s electrical system with the Kustom Truck Power Harness, designed to supply power from the alternator to the battery positive in Peterbilt trucks with NAMUX3 or NAMUX4 chassis electronics. This harness includes an ammeter sensor that plugs into the OEM chassis harness breakout, ensuring accurate current monitoring. Available in standard or extended lengths to accommodate different battery box locations—standard for boxes under the driver’s door and extended for other locations—this harness is ideal for engine conversions or cab swaps. Commonly used when replacing a Paccar engine, where the alternator shifts from the driver’s side to the passenger’s side (as seen in Caterpillar, Cummins, or Detroit engines), or during cab swaps upgrading to a NAMUX3 or NAMUX4 cab on an older chassis, this harness addresses the OEM harness’s insufficient length. Tailored for heavy-duty class 8 Peterbilt trucks, including NAMUX3 models 389, 388, 386, 367, and NAMUX4 models 567 and 579, it ensures reliable power delivery. Note: NAMUX3 electronics are typically found on 2011 and newer Peterbilt models, and NAMUX4 on 567 and 579 models. Confirm chassis electronics and battery box location compatibility by contacting Kustom Truck for fitment verification. Enhance your truck’s electrical system with this precision-engineered power harness, crafted for durability and precision.
Kit Includes:
- (1) Power Harness (Standard or Extended Length)
- (1) Ammeter Sensor
Key Features:
- Power harness for Peterbilt NAMUX3 (2011+ years, models 389, 388, 386, 367) and NAMUX4 (models 567, 579) chassis electronics
- Supplies power from alternator to battery positive with integrated ammeter sensor
- Available in standard (driver’s door battery box) or extended lengths (other battery box locations)
- Ideal for engine replacements with passenger-side alternator relocation or NAMUX3/NAMUX4 cab swaps
- Compatible with Peterbilt models 389, 388, 386, 367, 567, and 579
- Note: Confirm chassis electronics and battery box location with Kustom Truck
- Engineered for precise fitment and durable performance
Enhance your Peterbilt truck’s electrical system with Kustom Truck Parts’ Power Harness, crafted for durability and precision.