I have a 2007 T320 that when you push the start button the starter engages for just a second and stops. I have to hit the stop button to try to start it again with same results. Replaced the relay but it was clicking every time I push the start button. The fuel shut off solenoid only opens for that split second and when the starter stops the fuel solenoid close. I can take the new fuel solenoid off and jump the starter and it will start and run. I did a test on the buttons from the screen and all worked. All fuses are good, connections cleaned. New items are, Battery, starter, fuel solenoid, and relays. What else can I try? this started all the sudden, have had no issues. V3800 T2 engine. Thanks