12V/24V Diesel Parking Heater Wiring Harness Adapter

12V/24V Diesel Parking Heater Wiring Harness Cable Adapter — Round & Triangle Plug

Keep your diesel air parking heater running at its best with this purpose-built wiring harness. Designed to connect your parking heater motherboard, LCD control panel, fuel pump, and external power supply into one reliable loom, this adapter eliminates guesswork and ensures a clean, secure electrical connection every time.

Available in both Round and Triangle control panel plug styles, this harness is compatible with Webasto, Eberspacher, and similar 12V/24V diesel air parking heater systems. Please check your control panel plug type before ordering to ensure proper fitment — round and triangle plugs are not interchangeable.

Key Features

• Universal Voltage: Compatible with both 12V and 24V heater systems
• Plug Styles: Available in Round or Triangle control panel connector — choose the correct type for your heater
• Generous Cable Length: Approximately 2 metres total cable length for flexible routing
• Color Options: Available in Black or White
• Multi-Connection Loom: Connects heater motherboard, LCD switch, fuel/oil pump, and external power supply
• Broad Compatibility: Fits Webasto, Eberspacher, and comparable diesel air parking heater units
• Durable Construction: Quality insulation and secure connectors for reliable performance in demanding vehicle environments

Specifications

What's in the Box

• 1 × Wiring Harness / Cable Loom Adapter

Important Fitment Note

⚠️ Before ordering, carefully check your heater's control panel plug shape (Round or Triangle). The connectors are not interchangeable. Also take care to distinguish the color and style of your plug to ensure a perfect match.

For safe vehicle electrical work and wiring guidelines, refer to the OSHA Electrical Safety guidelines to ensure safe installation practices.

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Frequently Asked Questions

Q: How do I know if I need the Round or Triangle plug wiring harness?

A: Look at the connector port on your diesel parking heater's control panel or LCD switch. If the plug opening is circular, choose the Round plug version. If it has a triangular shape, select the Triangle plug version. Ordering the wrong type will result in the harness not fitting your heater, so double-check before purchasing.

Q: Is this wiring harness compatible with both 12V and 24V diesel parking heaters?

A: Yes! This wiring harness cable adapter supports both 12V and 24V systems, making it suitable for a wide range of vehicles including cars, trucks, vans, RVs, and boats that use diesel air parking heaters such as Webasto or Eberspacher units.

Q: What does this wiring harness connect?

A: The harness loom is designed to connect the parking heater motherboard, LCD control panel switch, fuel/oil pump, and external power supply — providing a complete, organised wiring solution for your diesel air parking heater system.

Q: How long is the cable?

A: The total cable length is approximately 2 metres (about 6.5 feet), providing enough reach for most standard vehicle heater installations with flexible routing options.