HMMWV 6.5L Engine Wiring Harness – P/N 12446828 – NSN 6150-01-412-3192 – Detroit Diesel 6.5 NA

Description

This listing is for an original engine compartment wiring harness used on HMMWV A2 series vehicles equipped with the Detroit Diesel 6.5L naturally aspirated engine.

The harness distributes electrical power and signals between the vehicle electrical system and the engine components, allowing proper operation of the starting system, charging system, sensors, and glow plug system.

This is a military-spec harness assembly designed for Humvee vehicles and built to withstand the vibration, temperature, and environmental conditions typical of military service.

Identification

Vehicle Platform
HMMWV / Humvee A2 Series

Engine Type
Detroit Diesel 6.5L Naturally Aspirated

Part Number (PN)
12446828

NSN
6150-01-412-3192

Component Type
Engine compartment wiring harness

Approximate configuration

• ~30 conductors
• ~15 connector branches for engine components

Compatible HMMWV Models

This harness is commonly used on A2-series HMMWV vehicles, including:

• M1025A2
• M1035A2
• M1043A2
• M1045A2
• M1097A2
• M997A2

Compatibility should be verified before installation.

Function

The engine harness distributes electrical power and control signals to key engine systems.

Typical connections include:

Starting and Charging System

• Starter solenoid
• Alternator

Engine Sensors

• Coolant temperature sensor
• Oil pressure sender
• Engine speed / tach signal
• Fan clutch control

Cold Start System

• Glow plug controller
• Glow plug wiring branches

Other Connections

• Engine grounding points
• Protective control box
• Main vehicle body harness interface

Engine-to-Body Interface Connector

The large green military circular connector (Cannon / Amphenol type) visible in the photos is the engine-to-body interface connector.

This connector links the engine harness to the vehicle wiring harness located on the right rear firewall area of the engine compartment.

Through this connector the engine receives:

• 24V vehicle power
• Engine start signal
• Instrument gauge signals
• Glow plug control signals

Construction

• Military-spec wiring
• Protective braided loom covering
• Sealed military connectors
• Designed for high vibration and harsh environments

Condition

Military surplus component.

• Shows normal wear from service or storage
• Wiring insulation and connectors appear intact
• Sold as shown in photos

Please review images carefully before purchase.

Ideal For

• HMMWV restorations
• Replacement of damaged engine harness
• Military vehicle maintenance
• Spare parts inventory