Trailer Light Converter

The problem with towing a regular trailer with a Pinzgauer is that it has a 24V system. Several people tried several solutions - using a 24V-12V converter and switch with relays, 24V bulbs in the trailer (how do you get sealed 24V lights??) - and I didnít like them all. As an electronics engineer it had to be an electronic solution..... The Pinz fortunately already has the right signals at the connector (guess there was an American designer saving a bulb?!?) so the circuit turned out quite simple. It only works with light bulbs and not with LED lights but as I donít have any LED lights it doesnít matter. The trick I used is that the light bulbs only need an average voltage of 12V to operate as they should. Whats easier then just to chop the 24V signals with a 1:1 duty cycle! The enclosure is mounted to the Pinz plug, the other side ends in a US standard 4 and 6 pin connector. If you want such a converter too: I have some printed circuit boards left over which I would sell at cost. Just .................

To see the schematic and a discription please download the PDF file here......

As the tail lights were split the converter didnít do the job any more. The seperate brake and turn signals had to be combined again. A modification of the converter will accomodate this.

© 2002-2005, K. Juergen Schoepf