# 23742374 Wiring Harness | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta 24 V alternator W-signal wiring harness, weighing 0.008 kg and listed for 43 D series engine applications. The W terminal feeds the tachometer, so both the voltage and the signal source matter.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** 300-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   24 V alternator W-signal wiring harness
-   0.008 kg
-   Listed for 43 D series engine applications
-   Cables and Fuses group

## 🔌 Function

Carries the alternator's W terminal signal to the tachometer, so engine speed can be read at the helm.

## ⚠️ Common Signs of Failure

-   Tachometer reading zero, or jumping about
-   Rev counter reading roughly half or double the true speed
-   Reading that only appears once the engine has warmed up
-   Green or powdery corrosion at the alternator terminal
-   A broken core inside intact-looking insulation, found on continuity testing

## 🛠️ Service Notes

-   Confirm the system is 24 V and that the tachometer is set for a W terminal source before fitting
-   Check the alternator terminal and the instrument end before replacing the lead

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-440A-G, D6-300I-G
-   Volvo Penta D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-K MP, D13B-N MH, D13B-N MH (FE), D13C6-A MP, D13C1-A MH, D13C5-A MP
-   Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
-   Volvo Penta D11B3-A MP, D11B4-A MP, D11B2-A MP, D11B1-A MP
-   Volvo Penta D4-320I-G, D4-300I-G, D4-320A-G, D4-300A-G
-   Volvo Penta D16C-D MH

## Details

- **Price:** 53.28 AUD
- **Vendor:** Volvo Penta
- **Type:** Electrical & Wiring
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 53.28 AUD | In stock |

## Images

- 23742374 Wiring Harness | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/23742374-wiring-harness-genuine-volvo-penta)
> Updated: 2026-09-23