fault code recorded by diagnostic equipment c1035 reservior valve electrical failure, which is located at rear of air storage tank n/s under car.new valve fitted did not cure fault,traced fault to high resistance in earth wire on two pin plug at valve.fitted new wire between res valve and control module located in drivers kick panel JOB DONE

Hope you don't mind me asking Jake, how long have you had the vehicle and how's she been so far! Not a good sign I suppose that your first post is a fault report.