6720370F91
MM,HARNESS , ZVR, SUSPENSION GAUGE, 6X4
Navistar International®

MM: Maintenance Module - A maintenance module is an electronic device that monitors and controls various systems in a commercial truck. It is responsible for collecting data from sensors and other electronic components, and then using that data to optimize the performance of the vehicle. HARNESS: Wiring Harness - A wiring harness is a collection of wires and connectors that are used to transmit electrical signals between different components in a commercial truck. It is typically used to connect the engine, transmission, and other systems to the vehicle's main computer. ZVR: Zone Valve Relay - A zone valve relay is an electronic device that controls the flow of coolant through different zones in a commercial truck's heating and cooling system. It is responsible for opening and closing valves to regulate the temperature in different areas of the vehicle. SUSPENSION GAUGE: Suspension Air Pressure Gauge - A suspension air pressure gauge is a device that measures the air pressure in a commercial truck's suspension system. It is typically used to ensure that the suspension is properly inflated, which can help to improve the vehicle's handling and stability.