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The photo doesn't show a lot due to lack of good access. However, both ground wires connect under the one screw.

You are correct. Facing the rear of the mobilizer control, on the upper right is a screw that has both ground wires attached. One ground wire goes into the wiring harness and on to somewhere else. The second ground wire, the short ~6 inch ground wire, exits out the left side of the mounting...

The hazard light switch is the turn signal switch, there is nothing to pull out. You simply move the arm up past the right turn position and the hazard lights come on. The cab hazard light is the same light as the light on the turn signal switch. It is very common that this light doesn't work...

It's good that you at least now have all six wheels airing up to the same level. You are making progress, so don't get discouraged. Are you certain that you don't have an air leak in the system somewhere such that the compressor can't keep up with the leak and the controller is trying...

One other thing to remember is that these trucks range from 25 - 30 years old and most have had minimal or no PM on the CTIS system either during active military use or subsequently. In addition, the M35A3 trucks were the first deuces to have CTIS so mechanics and drivers had no practical...

I think CM Automotive Systems is now out of business. It's too bad, because I've talked to them on the phone in the past and they were very helpful. They even sent me a brand new wheel valve at no cost when I told them it was for my ex-military M35A3. Try cleaning the wheel valve first and...

As HDN says, start with the TM. The CTIS on the A3 is a very simple system. Since 5 of the tires are at the same pressure, to me it sounds like you need to remove and clean the wheel valve on the 6th wheel. They are very simple to open up and clean.