Square Wheel Industries, Inc.
Manufacturer of trailer light and brake testing equipment to the trucking and RV industries.
- 610.921.8561
- 610.921.8571
- 80 Witman Road
Reading, Pennsylvania 19605
United States
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product
Trailer Light and Air Brake System Tester
Express Mobile
The Express Mobile eliminates most of the walkingassociated with trailer servicing. When you eliminate all that non-productive time and effort, you can easily check all lighting functions and the air brake system (including brake adjustment) in just two minutes, start to finish.
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product
Trailer Light Tester
Checkmate 1200
Checkmate 1200 is a good, basic light tester for trailer light systems that can also serve double duty to power anti-lock brake systems.
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product
RV Protocol Trailer Light and Electric Brake System Tester
RVCHECK
The RVCHECK is a fast, easy, low-cost way to test RV lighting and electric braking systems. In addition to powering an RV trailer's lighting circuits for easy checking, your RVCHECK measures the current draw of the electric brake coils, and checks the break-away battery circuit.
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product
Trailer Lighting System Tester
Scanner
A Scanner Trailer Lighting System Tester makes the job a lot faster and easier since it powers your trailer's lighting circuits in sequence. You check the operation of all lighting functions in a single walk-around instead of two or three.
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Trailer Light Tester with Ammeter
Checkmate 1200-A
An improved version of the Checkmate 1200, this reasonably-priced tester comes equipped with a 0-to-20-amp ammeter. It's capable of testing SAE trailers or RV's with electric brakes.
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product
Blade Socket Tester
RV 7
Blade Socket Tester offers a fast, easy way to isolate a lighting problem to the trailer or towing vehicle. A must have for anyone who deals with hitch and lighting hookup installations, it tests the output of towing vehicle's RV 7-blade lighting socket.
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Trailer Light & Air Brake System Tester
Express Garage
The Express Garage Trailer Air and Electrical Systems Tester is a tool that anyone with even basic air brake knowledge can look at and instantly know how to use.
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Pole Plug Tester
SAE 7
LED Indicators quickly identify complete circuits by glowing red. No light means a problem circuit.Constructed of molded PVC for impact resistance.Internally grounded.Solid brass pins/sockets.Use with adapter #01030 to test continuity of light cords.
