Hello, I have a Kögel truck Deichsel trailer (BJ 2003) with air suspension and EBS system from Wabco. The trailer is now used as a transport vehicle for silage bales on a farm. It is pulled with a tractor (2-circuit compressed air system). On the ABS plug are on PIN 1-4 24v DC. These are generated by a 150 watt voltage converter which is connected to 12V continuous plus to the tractor. Thus the EBS system has current. PIN 5-7 are not used on the plug. Unfortunately, the trailer always brakes relatively strongly. Although not as strong as if there is no current on the plug, however still strong. This makes itself noticeable on the road that comes to a stop immediately when the trailer brakes firmly. On loose ground like field roads or in the field the wheels block even with solid brakes. Is it possible to adjust the EBS system softer?? MfG