Gillig Cummins Jumper Harness
What is it?
The Gillig Cummins Jumper Harness provides essential wiring connectivity between the DEF Head Unit and the system electronics in Gillig buses powered by Cummins engines. It ensures proper power, signal continuity, and routing so the DEF system communicates accurately with vehicle controls.
Why choose this OEM Jumper Harness?
Designed specifically for Gillig chassis paired with Cummins powerplants, this OEM harness attaches directly to factory OEM connectors—no splicing or custom wiring required. It helps prevent electrical faults, warning codes, and communication errors that can occur with generic harnesses.
Key Benefits
✅ Ideal drop-in fit for Gillig transit buses using Cummins engines
✅ Maintains consistent signal connection between DEF system components
✅ Durable design resists vibration, moisture, temperature changes, and wear
✅ Compatible with original OEM sensors, connectors, and ECM wiring
✅ Helps prevent DEF system alerts, sensor errors, and service interruptions
Applications
Perfect for Gillig city and commuter buses that use Cummins ISB or similar engine platforms. It supports DEF system integrity during stop-and-go routes and continuous transit service conditions.
Installation Notes
Before replacing, turn off the vehicle power and relieve any pressure in the DEF system. Disconnect and label existing harness connections, then plug in the new OEM jumper harness securely. Ensure clip engagement and cable routing match factory specifications. After installation, clear any fault codes and verify system diagnostics with a scan tool.
Final Thoughts
If your Gillig bus is experiencing DEF system faults or intermittent communications, this OEM jumper harness restores continuity and helps keep the DEF system functioning properly. Available now at Tamerx to support transit uptime and operational peace of mind.