Hi there its a boss LE16. The Leds seem to work ok as if to say the unit is doing its job. I was looking for those diodes but could not find them, guess i was looking in the wrong place, i suspect one of those diodes to be open circuit. Thanks for letting me know where i can find it, will have a look tommorrow and let you know results. If anyone still gets the wiring info please forward so i can bench test the steinbock power steer units in the future. Thanks once again