Multiquip EM802378 12 VDC Relay

The Multiquip EM802378 12 VDC Relay is a genuine OEM electrical relay designed for a range of Multiquip equipment including the AR14H asphalt roller, WTB-16 and WTB-16PD track buggies, and LS-series concrete pumps including the LS300G, LS300GK, LS300P, LS450, and LS600P. As a direct OEM replacement, this relay matches the original electrical specifications required by each of these machines, ensuring correct switching behavior and circuit integrity right out of the box. Sourced directly from Multiquip, part number EM802378 carries the same quality standards as the component installed at the factory. DHS Equipment stocks genuine Multiquip parts so you can get the right part the first time.

Key Features

• Correct 12 VDC Rating — Matched to the electrical system voltage of compatible Multiquip equipment, preventing under- or over-switching that can damage connected circuits.
• Genuine OEM Component — Manufactured to Multiquip's original design specifications, maintaining proper coil resistance and contact load ratings for dependable switching performance.
• Direct Plug-In Replacement — Connects to the existing relay socket and wiring harness without modification, making installation straightforward for qualified technicians.
• Broad Equipment Compatibility — Fits the AR14H roller, WTB-16 and WTB-16PD power buggies, and LS300G, LS300GK, LS300P, LS450, and LS600P concrete pumps under one part number.
• Electrical System Integrity — A failed relay can prevent engine start, disable safety interlocks, or interrupt critical control circuits; replacing it promptly with the correct OEM part restores full system function.
• Safety-Critical Fit — Relays often control starter, fuel, and interlock circuits — using the specified OEM part ensures these circuits switch at the correct load and timing parameters.

A 12 VDC relay is an electrically operated switch that uses a low-current control signal to open or close a higher-current circuit within the machine. In equipment like concrete pumps, rollers, and power buggies, relays manage critical functions such as engine starting, fuel delivery, and safety interlock systems. When a relay fails — whether due to burned contacts, a failed coil, or internal arcing — the circuit it controls stops functioning, which can prevent the machine from starting or cause unpredictable shutdowns during operation. Replacing a faulty relay with the correct OEM unit restores proper electrical switching and protects the downstream components it serves.

For fitment questions or help confirming compatibility with your specific unit, contact the DHS Equipment parts team directly.

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.