IIT 7 Blade & 4 Pin Tester
Have you ever been just about to leave to a job site or go on a vacation, only to hook up to your trailer to find that your lights are not working and have no idea what the problem is? Never will this happen again with this tester! This checks to see of the 12V power is running from your tow vehicle is reaching your trailer plug or if there is something wrong with the wiring.