Cm 870 turbo actuator control module

[Rawze]

(12-26-2025 )Slappy Wrote:  So,little update..I’ve checked out and load tested all the batteries,checked out all my grounds and alternator. Everything is good and voltages are normal. I’ve tested 3 turbo control boxes on unit and the same thing is happening every time. I have torn the wiring harness apart and found nothing…completely stumped. Truck ran great til this starting happening and has a 2 year old Cummins recon ecm with no codes.

what are the actual turbo-specific related symptoms?.. your first post was a bit vague. Boost spiking and dropping back?>,. or what?.

and has anyone moved the control arm for the turbo to ensure its not hanging up and operates smoothly?.


Is the programming completely factory?... or is it a de-mandate program?.