
Trailer Tester
The Trailer Tester is an extremely rugged, durable and valuable tool for testing the wiring and lighting systems on commercial truck trailers to help find and eliminate any electrical circuit problems. It is designed for use in facilities that manufacture, refurbish or test trailers. The trailer is simply plugged into the tester and then using either a convenient wireless remote or the front panel buttons the operator can switch power to any combination of the six individual circuits in the trailer:
- Clearance, Sidemarker and I.D.
- Left-Turn Signal and Hazard
- Right-Turn Signal and Hazard
- Tail Lamps, Marker Lamps and License Plate Illumination
- Stop-Lamp and ABS
- Continuous Power
Easy to read LED displays aid with testing/troubleshooting by showing the current drawn by the circuit as well as open and short-circuit faults.
The Trailer Tester is available through ProQuip International under the name RT300 Remote Tester.




Trailer Tester Features
- Wireless Hand-held Remote – circuits can be activated from anywhere around the trailer - saving time and money
- Heavy-duty Design:
- Internal protection circuitry and resettable circuit breakers prevent damage to the tester if it is connected to a short-circuit.
- No mechanical switches on the main unit that could wear out or break - advanced circuitry senses the operator's fingers through a solid panel of high-impact plastic.
- A rugged piece of equipment made for use in a dirty environment and built to last.
- Easy to Move – the entire tester and battery are mounted on a wheeled cart so it can be quickly and easily moved around the work area.
- User-friendly – a powerful tool yet simple to use.
- Multiple Power Sources – accepts power from a 120VAC source or a 12V automotive battery, or both.
- Built-in Charger – internal power supply automatically charges the battery.
- Standard Interface – uses an industry standard SAE J560 cable and a 12V automotive battery.
- Modular – the main control unit can be used as a stand-alone tester by simply lifting it off the cart.
- Auto Power-off – preserves battery life if tester is left on.
The Trailer Tester is available through ProQuip International under the name RT300 Remote Tester.