Hi the motorhome as done 20k miles all the brake discs and pads look fine brake resovoir as been changed and checked so we know the sensor is not at fault ,so when I put ignition on the dash bings with low brake fluid warning sighn on dash ,was hoping someone else as had this fault ,I've also checked handbrake switch that's ok,dionostic not showing any faults next job taking each wheel off and it's a tag axle thanks dj