i have a kumatsu HM 300-1 articulating dump truck. wen i turn on the ignition the emergency steering automatically comes on and does not shut off until i turn of the key or start the engine. the park brake also does not work at all its disengaged at all times the park brake and emergency steering are on the same fuse. when i take out the fuse the emergency steering works normal. i tried a new park brake switch but that didnt seem to fix it. the wiring is all good. when i plug out the park brake pressure switch which is located on the hose going from the valve to the park brake the emergency steering also works normal again. also when there is no pressure on the pressure switch it works normal. so what im wondering is if the solenoid on the valve or the valve itself could be causing problems. Thanks in advance
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