Features and Benefits:

• Quickly and easily test trailer circuits on most light to medium duty trucks and campers
  
• Tests vehicle circuits on 7 Flat/Spade Pin connections - quickly identifies faulty circuits
  
• Made from LEDs and ABS plastic - ensures durability
• 1 Year Limited Warranty

Tester plugs into vehicle side wiring harness. Each of the 7 leds on the tester correspond to the correct circuit. An LED not lighting up for a particular circuit indicates a problem from the vehicle wiring haress back to the fuse box.