Function : 4 way trailer circuit tester can use check proper function of your vehicle's trailer wiring harness,suitable for diagnosing trailer light issues.Don't need extra tools or batteries
Special design : 4 pin trailer plug tester have small size and is convenient for storage,fit your car door pocket or tool box.The trailer plug tester is marked with clear LED light to tell you which of your towing vehicle lights work or not
Simple to use : The 4 pin trailer plug tester is easy to use,plug the tester into the 4 pin flat trailer connector on your car and check circuit wiring is functioning correctly.LEDs will all light up if circuits are running correctly
Material :4 pin trailer socket tester made of durable ABS plastic,which rust resistance and wear,one end is fitted with a dust-proof rubber sleeve to protect the terminals when not in use
Suitable vehicles : Trailer Light Tester suitable for most types of vehicles including trucks, boats, trailers, caravans, campers, and other towing vehicles, etc
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