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The neutral relay K26 provides the 24v for K11’s coil on pin 86, but that is not what controls K11. The path from pin 85 to ground which will allow current to flow and energize the relay is how K11 is actually energized. So once again I ask DO YOU HAVE A LOW OIL IDIOT LIGHT IN THE DASH WHEN...

Beeswax and bunny farts… if the cab is level, you don’t really need any as the gutter will drain down the center of the windshield before the water gets high enough to go over the lip. But if the cab is slightly tilted to the rear the gutter can just barely get deep enough to surmount the lip...

well how much pull does the Rostra servo have? As for signal. you have the final output speed sense and the engine tach pick-off on the engine flywheel. i believe both these signals are used raw by TCU, speedometer and tachometer. Vehicle speed is sensed off of a 36 tooth gear in the...

That is the best way to check for wheel valve leaks. so they look OK to 70 PSI by your testing:) The top half of that diagram is a CTIS plumbing diagram found on a 6X6 truck. you probably do not have the kneeling valves shown on the front wheels at the extreme left as they were discontinued...

Well if the primer will lift fuel to the filter it should be able to push it entirely thru the system and you should be able to get fuel out the return line where it attaches back to the fuel tank. No chance of it starting without filling the gallery in the head completely with fuel… if you...

What general said. The wheel valves are leaking… bad or dirty diaphragms. Everything after the PCU is controlled with air pressure and flow. The front axle dump valve is on the right side of the transmission. The dumps for the rear axles are on the crossmembers above those axles. when...

Where exactly is "this valve" located? That is a Quick reacting or dump valve, there is one for each axle(services 2 wheels). it has one input port and 2 output ports(one for each wheel), and a vent port. These are remote pressure regulators whatever is applied to the input port the valve...

Yea the military didn't pop for the oil level sensor on the control module...

Are you in mode offroad? the trans may hold lockup deeper into 2nd with 1st as the lowest gear... There is also a programmable option for manual or automatic lockup control(2 switches, manual/auto and on/off), but you would want a sure way of disconnecting it before you tried to roll to a...

did you actually ring out the TPS resistor and confirm its response is linear? the TPS cal only sets the 0 and 100% pedal positions it does not really evaluate the slope in between, but TPS input has a huge effect on how the allison responds and shifts. I show how to check this out and show...

Well Thanks, but it was General that suggested it... I have not had a chance to play with it yet:)

You need to make your video public on YT…

You have to upload it someplace like Youtube and link to it…

You use one port on the thermostat block(pre-thermostat) same place where the cabin heater is fed from. You could T off the cabin heater supply port. There is a port with an Allen head plug on the side of the engine block all the way back by the transmission/bell housing on the passenger side...

What batteries are you running? The 100A dual volt alt really gets hamstrung pulling 12V out of its middle. it cuts the total wattage by nearly 1/3(1930 watts at max 12V and 24V load). Thats the real issue with the 100A alt. In the end, the truck load is perhaps ~35A total @ 28V if...

Well where do you use red oil? the PTO gearbox I believe uses pressure lube, thats that hose connected down to the corner of the control module... you could pull the hydraulic pump off of the PTO drive and should be able to confirm this, particularly if your trans uses red ATF...

I wouldn't worry about the belt right away, there is a parts spreadsheet link at the top of this LMTV forum...

A pair of group 31’s in series will work just fine, it is what cat specced for these engines. The 4 batts were to meet a milspec requirement, but the alt was too small to support them properly. A pair of 31’s is what I use, and are a great match for the alt. Yes 2 alternator belts, there is a...

The schematics in the manual are in an unusual format and can be a little hard to follow As the start circuit hops around between several pages. Here is the A0 start circuit condensed to one page…

Ok, it looks like a 98 M1078 A0 that looks like the standard alternator mount, it is missing a drive belt… should be a couple of things going click when you turn on the ign switch, and when you push the button. The loud click under the cab is a good sign that is probably the aux start...