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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5570
Experience:  Owner at DJ Wilson
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My Navistar based 2003 fire engine with a dt530e has a high

Customer Question

my Navistar based 2003 fire engine with a dt530e has a high idle switch not working. how does the electronic throttle on/off switch engage the throttle to elevate
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.
Hi my name is***** will be glad to help. the PTO switches will allow the throttle to work when the air switches for the park brake engaged and service brake switch is open when parked and both switches disengaged while driving for cruise along with the clutch switch. The ECM gets the signal from these switches. Check the switches and harness. Let me know