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Lighting & Electrical Testers

Automated Trailer Tester: Lighting & Electrical Systems


Utility Trailer Tester 12 volt DC output
12 volt DC input is required

The Pro-check 725 comes with a 7-way "flat-pin" connector, optional remote, and works best with medium / light-duty trailers, such as U-haul trailers. The Pro-Check 725 is available in two versions: The Pro-Check 725 (PC725) is powered by a 12 volt DC power source.

Electric trailer brake support is built into the Pro-Check 725:
Onboard battery voltage is displayed, and brakes are activated along with the trailer's brake lights.


Commercial Trailer Tester 12 volt DC output
12 volt DC or 110 AC input power is required

The LITE-CHECK Pro-Check is a rugged, lightweight, and low cost family of computer controlled trailer testers. LITE-CHECK's patented active diagnostic system takes the mystery out of identifying electrical problems in trailers by directly identifying each specific type of electrical wiring fault and the specific electrical circuits that they are present on Each fault is identified on the
Pro-Check's digital display as an Open Circuit, Open Ground, Short (w/ all circuits identified), or Chassis Ground. An audible alarm sounds whenever a fault is present in a circuit that is being tested, and the alarms are unique for each type of fault.The Pro-Check is available in three distinct models:


Power Requirements:


  • DC Power Supply
  • Additional Remote Control Units
  • Remote Control Neck Pouch
  • Cables (various lengths)

What Comes in the Box

  • Pro-Check 720, 724 or 725 Tester
  • Remote Control with "high-visibility" neck pouch
    (optional with 725)
  • Owner's Manual
  • One Year Warranty that includes software updates and phone support