12V Trailer Socket Tester Towing Trailer Plug Socket for Car Trucks RV

【Trailer Wiring Tester】: 7 pin trailer wiring towing vehicle socket tester is widely suitable for 12V trailer, RV, Vehicle, Truck, etc. 【Easy Testing Process】: Connect 7 pin trailer tester plug and trailer light tester, press the yellow button of the tester.

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