Bad Move, never use a pressure washer, good chance you have water in All sort of places, undo the earth at bak of motor near starter motor clean put some dielectric grease in there then do same to Positive lead on starter motor do same at battery, pos and neg,now start pulling relays make sure there is no water apply Dielectric Grease, now do that to all connections you can find especially the ones behind the left little plastic in fill triangle between rear of motor and frame