Review on 🔌 Black Reese Towpower 74633 4-Way Tester by Andres Mayes

This worked to test the taillights/brakes but the connections for the turn signals were very bad. Sometimes I could get them to glow by bending the plug, but I couldn't even get two consecutive flashes to work. I ended up with a 57505 Curt Manufacturing 57505 12 volt flat blade circuit tester that worked great with no issues. (And this works for both four- and five-pin connectors.)