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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4394
Experience:  Owner at DJ Wilson
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I have an isx 550 cummins and I don't have a third stage on

Customer Question

I have an isx 550 cummins and I don't have a third stage on my engine break. It doesn't seem to want to work, what do you think could be the issue? Tim jensen
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.
Hi Tim, My name is***** will be glad to help. Remove the valve cover to access the harness and solenoids. Check the wiring to see if one is rubbed through or came off. If ok with the engine at idle press the center of each solenoid one at a time to see if the jake engages manually. Verify power to all solenoids. If so and the jake does not work, replace the faulty solenoid. You can swap solenoid places to see if the problem moves with it to verify. Let me know

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