Diagnostic tool for verifying your trailer’s lighting and braking circuits before each journey. The seven-pin flat connector tester uses LED indicators to confirm proper operation of running lights, turn signals, and brake functions.

Essential for catching loose connections or damaged wires that could compromise safety on the road.

• 7-Way flat pin configuration
• LED display for each circuit
• Tests running lights, left turn, and right turn signals
• Auxiliary and electric brake circuit capability
• Single-unit tester with internal ground