# 20886139 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta engine wiring harness with branch lengths, wire sizes, connector keying and protective sleeving matched to the specified ECU, sensors and actuators. The harness is a configured assembly rather than a universal loom, and its unused or additional branches depend on the engine option level.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD734GE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD752GE
-   Volvo Penta TAD753GE
-   Volvo Penta TAD754GE
-   Volvo Penta TAD765VE
-   Volvo Penta TAD764VE
-   Volvo Penta TAD763VE
-   Volvo Penta TAD762VE
-   Volvo Penta TAD761VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Genuine Volvo Penta Engine Wiring Harness - part number 20886139
-   OEM connector bodies and terminal positions
-   Circuit-specific wire gauges and insulation
-   Branch lengths match the original sensor and actuator locations
-   Protective conduit, clips and breakout points control chafe and heat exposure
-   Includes the grounding, shielding or twisted pairs required by sensitive signals
-   Must match ECU generation, system voltage, emissions equipment and engine serial number
-   Engine type: Application-specific Volvo Penta electrical/electronic control system
-   2 used per assembly

## 🔌 Function

The harness distributes battery power, grounds and low-level control signals between the ECU and engine components. It also preserves shielding, circuit pairing and connector orientation so the ECU receives accurate sensor information and can drive actuators reliably.

## ⚠️ Common Signs of Failure

-   Intermittent faults change when the harness is moved
-   Heat-damaged loom near exhaust components
-   Corroded terminals or water entry into connectors
-   Multiple unrelated sensor or actuator faults from a shared power/ground problem

## 🛠️ 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

### Other-Brand OEM Numbers

-   VOE20886139

## 📦 Condition

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

## Details

- **Price:** 174.29 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 174.29 AUD | In stock |

## Images

- 20886139 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20886139-wiring-harness-genuine-volvo-penta)
> Updated: 2026-08-22