Fits 4-Pin Small Size Trailer Light Tester & Circuit Troubleshooter, Quickly and easily see if your trailer wiring is properly installed on your vehicle
Small size fits easily in gloves compartment or pockets, No Batteries Required.
4 Pin trailer testers: ABS+ Coppers materials, with TAIL,LT,RT lights
Test right, left, turn, and brakes lights for proper functions.
Easy to carry, Compact Designs Fits in your pocket. If you have any questions please contact us first and we will give you 100% Satisfaction Guaranteed.