My 2008 G29E will go forward, but not reverse. When I push the reverse switch there is no buzz and it will go forward when the throttle is depressed, even with the switch in the reverse position. I haven't tried to drive it since I washed it pretty good the other day. I sprayed water over the undercarriage and also in the well under the floor mat and plate that covers the brake and throttle mechanisms because it was really dirty and dusty in there. Is there a wet or damaged electrical connection or some other problem?