22405370 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta wiring harness used with an expansion-tank and level-sensor installation. The harness is shown with expansion tank 22395120, sensor 21271982 and the related cooling-package components. It provides the correct connector and branch length for carrying the coolant-level signal into the engine or machine electrical system.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1643VE-B
• Volvo Penta TAD1640-42GE-B
• Volvo Penta TAD1640VE-B
• Volvo Penta TAD1641VE-B
• Volvo Penta TAD1642VE-B
• Volvo Penta TAD1641VE
• Volvo Penta TAD1642VE
• Volvo Penta TAD1643VE
• Volvo Penta TAD1650VE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TAD1640-42VE-C

• Engine Family: TAD

⚙️ Key Features

• OEM harness for the expansion-tank level-sensor circuit
• Associated with expansion tank 22395120 and sensor 21271982
• Correct sealed connector and wire length for the original cooling package
• Engine-bay insulation suited to heat, coolant vapour and vibration
• Supports reliable coolant-level warning operation
• Direct-fit connection without cutting or splicing when the application is confirmed

🔌 Function

The harness supplies the sensor circuit and carries the coolant-level signal to the monitoring or engine-control system. A reliable connection allows the operator to receive an early warning when coolant level falls.

⚠️ Common Signs of Failure

• False low-coolant warning
• No warning when the tank level is low
• Intermittent warning caused by vibration
• Corroded or coolant-contaminated terminals
• Broken wires near the connector or retaining clips
• Harness insulation chafed against the cooling package
• Open-circuit or short-circuit fault in the level-sensor circuit

🛠️ Service Notes

• Compare the new harness with the old one before fitting — check the connector types, the number of pins and the branch lengths, and lay it out alongside the old loom to confirm every branch reaches its component
• Disconnect the batteries before unplugging or fitting a harness, and support the loom as you work so its weight never hangs on a connector or a bulkhead grommet
• Route it along the original path and secure it with the original clips and ties, clear of hot exhaust surfaces, sharp edges and anything that moves; leave a service loop at each connector rather than pulling a branch tight
• Push every connector home until the lock latches and protect the joints with a marine dielectric grease — an intermittent electrical fault is far more often a partly seated or salt-corroded pin than a broken wire
• Renewing the harness is the right repair where insulation is chafed, brittle or oil-soaked, or where corrosion has tracked inside the connector bodies; patch repairs in a damp engine bay tend to fail again, and any single conductor that is repaired should be joined with tinned marine cable of the same gauge, a proper crimp and adhesive-lined heat-shrink

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• Related expansion tank: 22395120
• Related level sensor: 21271982
• Related expansion tank: 22821822

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging