# 20776299 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

Application-specific wiring harness used in the engine wiring, sensor, heater and control harness on the listed Volvo Penta engines. Connects the specified engine sensors, actuators and control devices through the original branch routing and connector layout.

## 🚤 Compatibility

-   **HP Range:** Approximately 160-300 HP
-   **Year Range:** Approximately 1999 - 2015

## ⚙️ Key Features

-   Genuine Volvo Penta wiring harness
-   Designed for the engine wiring, sensor, heater and control harness
-   Connects the specified engine sensors, actuators and control devices through the original branch routing and connector layout
-   Engine type: Four- and six-cylinder electronically monitored industrial diesel

## 🔌 Function

Connects the specified engine sensors, actuators and control devices through the original branch routing and connector layout.

## ⚠️ Common Signs of Failure

-   Intermittent starting, shutdown or sensor faults
-   Multiple diagnostic codes or implausible sensor readings
-   Chafed insulation, broken conductors or damaged branches
-   Corroded, loose or heat-damaged connector terminals
-   Voltage drop, short circuit or loss of communication

## 🛠️ Service Notes

-   Disconnect battery power and compare every connector branch before installation.
-   Route the harness through the original clips and keep it clear of heat, sharp edges and moving components.

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20998739 - 12V heater relay
-   21261350 - 24V heater relay
-   21261444 - heater switch
-   20998736 - main heater cable set
-   20998750 - heater adapter
-   20573949 - earlier 600W engine heater
-   20555190 - earlier cable through SN 1098013
-   20796993 - replacement cable set from SN 1098014
-   20796994 - companion cable set
-   20405599 - O-ring
-   947628 - sealing gaskets
-   969011 - sealing gaskets

### Other-Brand OEM Numbers

-   VOE20776299 - Volvo Construction Equipment prefixed number format

## 📦 Condition

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

## Details

- **Price:** 795.63 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 795.63 AUD | In stock |

## Images

- 20776299 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20776299-wiring-harness-genuine-volvo-penta)
> Updated: 2026-10-10