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Can't get may system to inflate past 28 psi. Then as the system shuts off the left front bleeds down to 18psi. I rebuilt that air valve with no resolve. I do have a rear axle hub leak, is that enough to prevent inflation past 28psi?

ok replaced the faulty solenoids and system functions. however it cant seem to inflate the tires. I do have a leaking wheel valve that will get fixed but also hear a lot of air movement in the rear hub area. cant tell if this noise normal or a hub leak. any tips? also what fails in the wheel...

good call. one tested at 47ohms and the other 2 tested open. ill see if I can run some of them down. thanks

Yes when I do that it just self checks again

ok so I have a m934a2 with 5 flashing lights the come on after normal air pressure is reached. the in cab unit will pressure check but not work. ive looked for leaks during the pressure check and can find none. Ive read through this but could use some additional thoughts. thanks