Bruce,
Since you had to remove a connector to install, verify all connections are good, clean and tight. Verify fuse 3 has not failed. This supplies power directly to the EPR. Since it starts on fluid, the EPR is no allowing fluid to enter the mixer. If everything checks good, suspect a bad EPR. Swap with a known good operating lift if you have a sister truck. Good Luck.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.