Review on IIT 16687 Blade Pin Tester by Michael Persing

I make a living selling trailers and every time I hook up a new trailer for a customer I want to make sure all the lights work before they leave. Headlights don't work from time to time so I use that right away to determine if the problem is primarily with the customer's car. Works perfectly! The only wish is that the LED turn signals are on both sides, because on some axles the fork is reversed.