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Thanks everyone for the help. I cleaned up the ground connections and replaced the government circuit breakers with automotive fuses. I also brushed some Deoxit on it all for good measure. I am not sure if the trouble is gone for good, but I just finished a flicker-free test drive.

I replaced the relay for the running or 'marker lights,' as the book calls them, with a new one from the truck parts store. The problem remains and now the headlights have started flickering also, which is a much bigger problem. Does anyone happen to know where the M1078 marker lights and...

Fantastic. Anyone know the best place to buy an LMTV 12 volt relay?

Does anyone happen to know which relay on the dashboard panel controls the LMTV running lights? Those are the yellow lights above the windshield and on each door, etc. Mine are flashing intermittently, regardless of whether the truck is moving or stationary, so I suspect a dying relay. I...

You've got to know someone. Namely, me.

My M1078 at the USAF Boneyard:

I removed the purge valve and cleaned it, but the problem persists. It looks like performing the full service on the air dryer would be just as much work as replacing it, so I might as well do the upgrade and save future headaches.

Does the new dryer replacement kit come with the mounting plate?

The LMTV is '92 model with a cylindrical dryer with cooling fins.

In the rain last week while helping a friend retrieve his P-24 fire truck from GovPlanet, my M1078 started releasing air pressure from the purge valve below the air dryer every 10 to 20 seconds. It has since dried out, but the air keeps dumping. Air gauges are holding steady at 120psi and the...

My CTIS works! Finally! Out of desperation, I stopped by the National Guard base to pick the brains of the real LMTV mechanics. They said the likely culprit would be the pressure sensor or the QRVs, which you guys have already mentioned. When I was there they happened to be loading a crate...

Thanks I got the tires back to 50psi by disconnecting the CTIS computer and manually inflating. I guess when I ops checked the gladhands the first time I happened to have the parking brake off and did not know that was a requirement because it does work now. I hope you are right (tenmogger)...

I forgot that I could just disconnect the controller and inflate the tires. Trouble is, since I returned from the deployment, I cannot get any air to my gladhands. The TM has pretty good troubleshooting steps for that. Neither the front nor rear gets air now, so the stuck valve is upstream of...

I guess this CTIS does not have a deflation problem after all. After almost a year of not being able to deflate the tires or to figure out why not, I was driving in the rain when the CTIS Overspeed caution came on. The usual three solid lights were still steady on, but the EMER light...

I think you are right to blame the release valves. After going through this discussion, http://www.steelsoldiers.com/showthread.php?152581-Manual-CTIS-Conversion-for-M-1078 I think my CTIS quick release valves might be seized up after a long time without any use when the controller was...

Coach is right about my poor choice of words. TJ should be able to set the regulator at the desired lower pressure for the tires and send it out. Once the the tires air down to the same pressure as the incoming air they will stop deflating, but the wheel valves won't close until the ingoing...

I took apart a wheel valve and figured out how it works. Even if the tire is inflated to highway pressure, a lower pressure applied through the line will actually deflate the tire, just like suprman says. The wheel valve gives the incoming air more leverage than the air in the tire, so low...

Mine still doesn't deflate. New controller. New wire harness. New manifold valve assy. Very expensive parts but they didn't change anything. I met a guy at the Phoenix MV show who was working on a circuit board which would read the CTIS fault codes without the $700 computer gizmo from...

The schrader valve on the wheel valves can release pressure from the tires, but loosening the screws on the wheel valves does not. i disassembled one of the wheel valve and it looked brand new inside so I doubt it is malfunctioning. i don't know enough about CTIS to list all the possible...

The controller and writing harness are new too. I tried those last Fall.