7 Pin DC 12V Truck Towing Light Cable Circuit Plug Socket Diagnostic Tool Lenses ITEM NAME:Fun Novelty Party Head

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7 Pin DC 12V Truck Towing Light Cable Circuit Plug Socket Diagnostic Tool Lenses ITEM NAME:Fun Novelty Party HeadITEM NAME: 7 Pin DC 12V Truck Towing Light Cable Circuit Plug Socket Diagnostic Tool img *{margin: 0; padding: 0;. Item Type: Diagnostic tools. This tester has one side to connect the 7 pins plug of a trailer and another side to connect the 7 pins socket of a car. Can effectively test the problem of 7 pins plug and socket connection.