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 door pocket or tool box, and it can acts as a standard 4-pin male and female trailer connector to connect standard 4-pin trailer wire
Simple to use : The 4 pin male and female trailer 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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