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Good, so the power comes from the fuse, to pin 30 on K19. It goes thru the relay and out pin 87A, which is why the relay must have 5 pins, as a 4 pin doesn't have pin 87A. From 87A it goes to the terminal on the run solenoid, so with a relay installed you should see the same 24v on TL28 at the...

The external manual battery sw near the batteries? That wont shutdown the engine, like the batt disconnect relays located near it, it simply disconnects the batteries. If the engine is running, the alt continues to power the truck..

Poor quality, poor service when something went wrong. As for the concept, I think it is simply a pair of alternators tied together. If the alts used are not readilly available, you are back in the position of having a rare bird under the hood and no spare parts… I am not specifically familiar...

Yep, hump for the trans, water tanks and some of the other hab systems inside the bed platform will go over top of it…

Hav heard nothing but problems with those, but have no personal experience…. Myself I will go with a straight 24v and converter, both widely used commercially in truck and bus fleets and readily available…. Sorry it was a bad alt chassis…. It being brushless it is probably diodes on the rotor...

Yep, those are the tests…

That second terminal on the reg is a F- terminal. It samples right where the field winding connects to the regulator. The field receives 24v on one endand the regulator switches/pulses it to ground on the other end to build and regulate the field which causes the generator to create power...

That link is to the 1506 alternator. The 3030 reg is a part of the 1506 and covered in that troubleshooting guide. It has tests to determine if it is alt or regulator…

Do you have the Neihoff manual? Goto the neihoff website here to download it. There are troubleshooting procedures in there. https://ceniehoff.com/Documents/Ctrl_Hyperlink/TG18_uid252021124312.pdf There are 2 screw terminals ON THE REGULATOR. The first question I always ask, is with the...

They all have it, it is modified for the specific application the truck is intended for, like in the picture of the M1079 picture shown. The M1080 (cab and chassis) has a plain secondary frame rail. I am going to turn my secondary rail/frame into my hab floor frame. Considering the weight I...

Yes, jumping IN the panel. That statement was made when he posted pics of a panel minus diode modules. I was mis remembering the run solenoid/start inhibit circuit using a diode. He put in diode modules and I clarified that was not an issue and tried to show him where to look for run solenoid...

Exactly what jump are you referring to? Because of this very confusion is why I only recommend “jumping” after I am positive the normal power is not available. Incorrect or unnecessary Jumping is how shit gets burnt up… Gave you info on places to look and you never responded… one last try...

You may need to re-program the transmission to use the TPS info from the data bus... Once you get the throttle by wire all installed and worked out…

Make sure you get the right terminal, because if you connect unfused 24v to the wrong terminal at the solenoid you will smoke the ground wire… it is best to disconnect the wires from at least one terminal to test with a volt/ohm meter, which is supply voltage and which is path to ground. To...

That is what the information I just gave you is for:) Relay K19 when de-energized, passes 24V from CB79 down to the run solenoid on the governor, which allows it to deliver fuel and the engine to run. When you turn off the main switch, the power supplied to CB79 is removed and the solenoid...

Yep, just got to my drawings one diode is used in the starter lockout circuit but none are used in the start inhibit circuit. first question, is K19 a 4 pin or a 5 pin relay? It, along with a few others must be 5 pin relays. It provides power to the run solenoid when de-energized so must...

Yea when i can get to my schematics this evening. Pretty sure it is the diode modules missing that is the no start issue though. At the left end of the row of fuses there are 3 empty 4 pin slots running up and down the panel. They each take a 4 pin module that has 2 diodes in it that are...

Ok well you are missing a lot. left side of power panel you are missing the diode modules(4 empty slots next to the relays) and the wiper delay module(top left corner). The diode modules being gone is probably why it wont start as I think one of them may be part of the start inhibit...

Is it an A0 or A1? As mentioned it doesnt run without fuel system being prime. You should be able to pump the primary fuel pressure to 10PSI. I have several videos on the primary system on youtube under username rronmar. beyond that an A0 needs a run solenoid and an A1 needs a functional ECU…

Sounds like you are pulling from the fan solenoid outlet, not the supply:)