This report describes the scientific work of designing and manufacturing an intelligent controller module prototype for automobile trailer connections. The functions of the module are both to drive the lamps and detect failures. The module also contains functions to handle other functions of the trailer. To learn about controller modules the group does extensive feasibility study.

The group receives three already existing modules, the functions of the three modules are studied and tested in the lab, this is done too get a overview of the construction. The method used I called reversed engineering, a way of constructing by analyzing constructions already done.

When the modules are analyzed, the functions of the prototype are tested and designed without copying the analyzed modules. The components that the analyzed modules are containing are also studied.

The requirement specification contains the functions of the prototype to bee constructed.

The work results in a working prototype of controller module that is planed too bee used as a base in the construction work of future modules.