J1587/J1708 Datalink Jumper Harness – Firewall to Dash Data Bus Block for NAMUX3 Peterbilt and Kenworth trucks.
This essential jumper harness connects the engine harness firewall connector to the data bus block inside the dash on NAMUX3 Peterbilt and Kenworth trucks. It is required for engines that use J1587 as the primary diagnostic protocol (Caterpillar, Cummins N14/M11, Detroit Series 60) to enable full diagnostic communication with the engine ECM using OEM software.
Kit Includes:
- (1) J1587/J1708 Datalink Jumper Harness
Compatibility:
- NAMUX3 Peterbilt and Kenworth trucks (pre-2016 models with data bus block)
- Engines using J1587 diagnostic protocol: Caterpillar, Cummins N14/M11, Detroit Series 60
Important Notes:
- This jumper is required for diagnostic communication on applicable NAMUX3 trucks. Without it, OEM engine software cannot communicate with the engine ECM.
- For 2016 and newer NAMUX3 trucks (no data bus block), a different jumper is required (PN: 99906011) that connects directly from firewall to OBD connector.
- Contact Kustom Truck for compatibility confirmation with your specific truck.
Key Specifications:
- J1587/J1708 datalink jumper for NAMUX3 chassis – firewall to dash data bus block
- Restores or enables full diagnostic access with OEM engine software
- Engineered for reliable connectivity and long-term durability
1 year
