GLOW PLUG CONTROL TSU M998 HUMVEE 6500398 12469158-2 , 2920-01-469-6903

Description:

The Glow Plug Control TSU 6500398 is an electronic temperature sending unit (TSU) used in the starting and preheating system of AM General HMMWV vehicles to control glow plug operation for reliable diesel engine starting. Commonly installed in HMMWV M998 series vehicles equipped with 6.2L and 6.5L diesel engines where automatic glow plug timing and coolant temperature sensing are required. Maintenance teams, military vehicle restorers, and fleet operators use this module for starting system repairs, replacement of failed controllers, preventive maintenance, and restoration of tactical vehicles.

Applications:

The Glow Plug Control TSU 6500398 is commonly used in AM General HMMWV M998, M1025, M1038, M1043, and related HMMWV variants equipped with Detroit Diesel 6.2L and 6.5L engines. The TSU configuration monitors engine coolant temperature and communicates with the Start Control Box to determine glow plug cycle duration, improving cold-weather starts and protecting the glow plug system in military, off-road, and fleet environments.

Technical Specifications:

• Manufacturer: AM General / KDS / NARTRON
• Model / Part Number: 6500398
• Alternate Part Number: 12469158-2
• NSN: 2920-01-469-6903
• Product Type: Glow Plug Control Temperature Sending Unit (TSU)
• Vehicle System Voltage: 24 VDC
• Function: Controls glow plug preheat cycle based on engine coolant temperature
• Control Type: Electronic Temperature Sending Unit
• Compatible Engines: Detroit Diesel / GM 6.2L and 6.5L Diesel
• Mounting: Coolant crossover manifold mount
• Compatible Equipment: HMMWV M998, M1025, M1038, M1043, and related military vehicles
• Operating Principle / Function: Monitors coolant temperature and interfaces with the Start Control Box to regulate glow plug operation
• Application Environment: Military, tactical, and heavy-duty diesel vehicle systems
• Supersedes / Replaced By: 12338772 / 1310055 in some applications

Common Replacements:

• AM General 12338772 Glow Plug Control TSU
• NARTRON 1310055 Glow Plug Controller
• KDS CR-2696 Glow Plug Temperature Sending Unit 6500398