The universal test case is the one-man function test of 7- and 13-pole trailer sockets. It contains a complete trailer lighting system, and the simply designed control panel makes the functions

• the trailer indicator light monitoring system,
• the switching off of the rear fog lights,
• the support of driver assistance systems
• and the parking aid deactivation

easy to control.

For testing the lighting system on 12-volt trailers with 7- and 13-pin trailer sockets, this compact testing device offers all necessary functions. The light channels can be switched on and off individually, and can be checked at any time using the built-in indicator light on the switches. Furthermore, the case offers the possibility to adequately test the continuous positive line at pole 9, as well as the charging lines at poles 10 and 11.