Draper 27197 13 and 7-Pin Towbar Socket Tester - Draper 27197, This socket tester is designed for use with halogen bulbs in 12 and 24V systems. It efficiently tests 13 and 7-pin sockets fitted to the rear of vehicles using the supplied adaptor. It comes with a 5m cable for easy one-person operation and provides a clear indication on the LED display when the towbar operation is detected. Draper 27197 13 and 7-Pin Towbar Socket Tester
