Trailer Light Tester 7-Pin, 12V Towing Wiring Plug Checker

This 7-pin trailer light tester lets you check towing wiring and trailer plug circuits in seconds, so truck and RV owners can confirm brake, turn and running lights before hitting the road.

• Connector: Plugs into a standard 7-way round trailer socket on the tow vehicle
• Voltage: Works with 12V vehicle lighting circuits
• Indicators: LED lamps show which circuits are live (brake, turn, tail, reverse, aux)
• Use: Diagnose trailer wiring faults without a second person or a hooked-up trailer
• Size: Compact handheld body stores easily in a glovebox or truck tool box

Typical delivery 7–15 business days.