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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...

Oops, second pic of the PPD label…

I think it is connected, i added some red markup, to a zoomed-in pic below. the 2 arrows are pointing at what looks to be the lower straight edge of the terminal lugs, which appear to be inline with the two cables… but even if it was not connected, where is the other end of that cable on the...

Wouldn't be particularly difficult to whip one up in steel or aluminum either:)

Holy Schneikies! The first pic of the polarity protection device shows it has 4 terminals. Should be a diagram on the side of it showing which terminals are 24V batt, 12V Batt, 24V load and 12V load The alternator and battery leads connect to the 24V Batt and 12V Batt terminals(4 wires...

I think shift point programming will be an Allison core programming thing and not accessible by any of us mere mortals… Allison Routinely locks out the second OD(our 7th gear) in many MD3060(our core transmission) applications. This is a common topic on the schoolie conversion forums, "how do...

Well then sadly, I cannot help you beyond how it is SUPPOSED to be wired and operate. I would still look to the polarity box and see what is on the 12V batt and load terminals. was it modified to provide 12V from a 24-12 converter, that is not working or not turned on?. That is how I have...

There is a power connection from the middle of the 24V battery, 12V to the polarity protection device forward of 1079 box, between spare and air filter. 12V passes thru a diode there and flows on to the X2 12V test point in the power panel and from there is distributed by the PDP. I am aware...

12 and 24V run from batteries to the Polarity Protection Device 12 and 24v batt terminals between spare and air filter. The alternator is also connected to those same 12 and 24V Batt terminals on the polarity box. THE power cables to the cab PDP are connected to the 12 and 24v load terminals on...

Exactly! The max cab load is probably under 25A for 14/28 combined, and the cables they used up to the power panel are probably good for close to 100A at those lengths, so you should see very little voltage drop on any circuit under normal use...

yep, developed voltage between the different ground points = resistance, probably in the connection points. All wires have resistance so you will see voltage, when doing this voltage drop test. it should just never be more than ~3% of the voltage carried by the circuit, or ~.84V for a 28V...

What year is this truck? The MMDC is the digital controller that drives the bussed/digital/electronic gauges. located under the drivers dash. All those check lights along with ABS could be caused by corrupted data buss information... Grounds: Starter to drivers frame alt to pax frame cab to...