Wacker Neuson 5200012799 Wiring Harness Complete, Trailer

The Wacker Neuson Wiring Harness Complete, Trailer is a genuine OEM component designed for the E1250 and HSH380 series hydronic surface heaters. This harness is the factory-sourced wiring assembly that connects trailer-mounted electrical circuits on Standard, Basic, and Premium configurations across both LP/NG and Diesel variants. As a genuine Wacker Neuson part, the is built to the exact specifications of the original component, ensuring correct connector fit, wire gauge, and circuit routing without adaptation. Compatible across a broad range of E1250S, E1250B, E1250P, HSH380S, and HSH380B machines, this harness covers the full E1250 and HSH380 product family.

Key Features

• Correct Circuit Architecture: — Genuine OEM harness maintains the exact conductor routing, connector pinout, and insulation rating specified for trailer-mounted electrical systems on these hydronic heater models.
• Direct Connector Match: — Plugs directly into existing trailer harness junction points on E1250 and HSH380 units — no splicing, re-pinning, or wiring adaptation required.
• Broad Model Coverage: — A single harness fits E1250S, E1250B, and E1250P variants (LP/NG and Diesel) as well as HSH380S and HSH380B configurations, both with and without generator.
• Protects Heating System Operation: — A damaged or corroded trailer wiring harness can interrupt power to critical heater control circuits; replacing with the correct OEM harness restores full electrical continuity and heater function.
• Electrical Safety Compliance: — Using the correct OEM harness maintains proper grounding and load-rated conductors, which is critical on fuel-burning heating equipment where electrical faults can create serious safety hazards.

The trailer wiring harness is the main electrical backbone connecting the control system and power supply to the trailer-mounted components on hydronic surface heaters. It carries the signals and current that allow the heater's controls, sensors, and output circuits to communicate and operate correctly. When a harness develops a fault — through corrosion, physical damage, or connector failure — the result can range from intermittent heater behavior to a complete loss of function, making prompt replacement with the correct part essential to restoring reliable operation.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.