Test Commercial Trailer Lights, Brakes & 12V Power Without a Truck

The #9102-18C Heavy Ranger® MUTT® Compatible with Milwaukee® M18® Batteries is a portable, water-resistant trailer tester designed specifically for commercial trailers with 7-way round pin (J560) wiring. It allows technicians to test trailer electrical systems without connecting the trailer to a truck, providing a fast and convenient way to diagnose electrical problems in the shop or field.

Powered by a compatible Milwaukee® M18® battery, the Heavy Ranger® MUTT® simulates the functions of a standard tow vehicle, allowing technicians to test running lights, turn signals, brake lights, 12V power, wiring configuration, ground integrity, and short circuits.

Its patent-pending smart adapter system helps stabilize current while providing protection against short circuits and premature battery depletion. Efficient power management helps maximize battery runtime, allowing more trailer tests per charge while reducing heat and RF interference for reliable diagnostic performance.

Portable Commercial Trailer Testing Without a Truck

The Heavy Ranger® MUTT® eliminates the need to connect a commercial trailer to a tow vehicle simply to test its electrical system. This standalone trailer tester provides technicians with a portable solution for troubleshooting, maintenance, safety inspections, and routine trailer testing.

Whether you’re working in a service bay, parking lot, storage facility, or job site, the Heavy Ranger® MUTT® makes it easier to diagnose trailer electrical problems without bringing a truck into the testing process.

Test Trailer Lights, Brakes & 12V Power

The Heavy Ranger® MUTT® simulates essential tow-vehicle electrical functions, allowing technicians to test:

• Running lights
• Turn signals
• Brake lights
• 12V auxiliary power
• Trailer wiring configuration
• Ground integrity
• Short circuits
• Brake function

By providing the necessary towing circuitry without a truck, the Heavy Ranger® MUTT® helps technicians quickly identify electrical problems and verify that a commercial trailer’s electrical system is functioning properly.

Designed for Commercial Trailers with J560 Wiring

The #9102-18C Heavy Ranger® MUTT® is designed specifically for commercial trailers equipped with a 7-way round pin J560 trailer harness.

This makes it a useful diagnostic tool for commercial trailer technicians, fleet maintenance departments, trailer dealers, and other professionals who regularly service heavy-duty trailer electrical systems.

Compatible with Milwaukee® M18® Batteries

The #9102-18C is designed to operate using Milwaukee® M18® batteries, providing convenient cordless power for trailer testing and diagnostics.

The integrated smart battery adapter helps stabilize current flow while protecting the trailer, tester, and battery from short-circuit damage. Efficient power management helps extend battery runtime so technicians can perform more tests between battery charges.

Battery not included.

Important: The battery adapter is designed for the specified Milwaukee® M18® battery platform and is not cross-compatible with other battery systems. Confirm compatibility with your specific battery model before use.

Built-In Short Circuit & Overload Protection

The Heavy Ranger® MUTT® features built-in circuit protection designed to help safeguard the trailer and testing equipment during diagnostics.

A 10A automatic-resetting thermal circuit breaker provides overload protection and helps reduce the risk associated with short circuits and excessive current draw.

This helps prevent blown fuses and eliminates much of the guesswork traditionally associated with trailer electrical troubleshooting.

Rugged & Portable Trailer Diagnostic Tool

Built for demanding shop and field environments, the Heavy Ranger® MUTT® features rugged polypropylene and powder-coated steel construction and weighs just 2.5 lbs. empty.

Its water-resistant design provides added durability for mobile trailer testing, while the manual control knob provides simple, straightforward operation.

The standalone design means technicians don’t need to position a truck next to the trailer simply to perform electrical testing.

Heavy Ranger® MUTT® #9102-18C Specifications

A Faster Way to Diagnose Commercial Trailer Electrical Problems

The Heavy Ranger® MUTT® #9102-18C provides a convenient way to test commercial trailer electrical systems without connecting the trailer to a truck. By simulating the functions of a standard tow vehicle, technicians can quickly verify trailer wiring, ground integrity, lights, turn signals, brake lights, 12V power, and short circuits.

With a rugged, water-resistant design, cordless Milwaukee® M18® battery operation, built-in circuit protection, and compatibility with 7-way round pin J560 trailer harnesses, the Heavy Ranger® MUTT® is an effective solution for commercial trailer diagnostics, maintenance, and safety inspections.

MILWAUKEE® is a trademark of Milwaukee Electric Tool Corporation. Innovative Products of America®, Inc. is not
affiliated with, authorized by, endorsed by, or sponsored by Milwaukee. Use of this adaptor is not endorsed by
Milwaukee and may affect the battery or tool warranty. Consult the battery manufacturer’s terms for details.