20409321 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta wiring harness connecting the fuel-filter housing pressure sensor to the engine electrical system. It is confirmed with pressure sensor 20484678 in TAD940GE and TAD941GE fuel-filter assemblies and is shared with Volvo heavy-equipment fuel systems.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD943VE
• Volvo Penta TAD952VE
• Volvo Penta TAD951VE
• Volvo Penta TAD950VE
• Volvo Penta TAD940GE
• Volvo Penta TAD940VE
• Volvo Penta TAD941VE
• Volvo Penta TAD941GE
• Volvo Penta TAD942VE

• Engine Family: TAD

⚙️ Key Features

• Dedicated short harness for the fuel-filter pressure sensor
• Connects pressure sensor 20484678 to the engine harness
• Used with fuel-filter housing 20464376 / later 21032642
• Confirmed in Volvo D9 and D12 fuel-filter assemblies
• Connector seals and terminal locking must remain intact
• Engine type: Volvo 9- and 12-litre electronic diesel fuel systems

🔌 Function

Carries the electrical signal from the fuel-filter pressure sensor to the engine control and warning system.

⚠️ Common Signs of Failure

• Fuel-filter pressure fault or warning
• Intermittent sensor reading
• Broken or corroded connector terminals
• Harness insulation damage
• Open circuit or short circuit near the filter housing

🛠️ 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

OEM / Related Numbers

• 20484678 - fuel-filter pressure sensor
• 20464376 → replaced by 21032642 - fuel-filter housing
• 20430751 - related fuel filters
• 20998367 - related fuel filters
• 3169582 - related fuel pump

📦 Condition

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