Seller notes

Test 7-way round pin towing circuits at the back of the truck “One-Person Testing” for Male and Female 7-Way Round Pin Tractor Trailer Plugs. Features and Benefits:Allows bypassing of troubled circuitry while on the roadPackaged with an extra jumper connectorPlugs into the vehicle side socketLEDs indicate that each circuit is workingEliminates guesswork“Winged” grip for easy removal from electrical connector...

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