Trailer Tester for Checking Trailer Lighting

Testing trailer lights without a towing vehicle. Properly functioning trailer lights are essential for the safe operation of a trailer. Using a professional trailer tester or trailer lighting tester, repair shops can check a trailer’s lighting functions and electrical connections and systematically pinpoint faults in the trailer’s electrical system.

The ATA 07 trailer lighting tester from Autotestgeräte Leitenberger is a portable 12-V tester with a built-in rechargeable battery. It electrically simulates a towing vehicle, including the necessary power supply. This allows the trailer lighting to be tested without the need for a passenger car or other towing vehicle.

The ATA 07 is suitable for 7-pin 12-V trailer connectors according to DIN/ISO 1724, 13-pin 12-V connector systems (WeSt), and 13-pin Multicon systems.

Typical applications include troubleshooting lighting issues, loose connections, or grounding problems, as well as functional tests following repairs to the wiring harness, trailer connector, or lighting system. The tester can also be used as part of preparation for or during the annual vehicle inspection (HU).