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I looked at the testing procedures again. What does not make sense to me is why the manual says "test this, the numbers (voltage, ohms, etc) SHOULD be in this range xx-xx. There are three 'tests', that all say the numbers SHOULD be in these ranges, then it says "If steps h,j,I are as indicated...

It is a TRC. I will report back after I get a chance to look at the manual and test it. Thanks

I worded that wrong. I have never looked in that section before NOW. Color coded wiring diagram is posted here (you actually posted it), but I did not see any manual about testing the voltage regulator. I have searched through many threads to no avail...

Slaved off a HMMWV. With generator running/charging, HMMWV running/charging, this is after charging both gen batteries with a 12v charger it still does not produce power. I honestly have never even looked at the TM section, that's one of those sections I have always overlooked. I did find the...

I do think the low batteries were the cause of the no-start, I thought the same about the no power but that doesn't seem to be the issue. Yesterday I had it slaved and also had a charger on one of the batteries on the generator. It had stopped charging the batteries but I figured out the...

I messed with it some more yesterday, I would think that if I am only getting 9-10 volts going to the excitation circuit, that may be the issue. I have looked at the schematic and can't figure out where the AC Volatage regulator gets it's 24v supplied from, and I would assume it needs 24v to be...

So I did step H and got 8 volts step J i got about 7 volts (AC) whether the switch was turned or not and step i, the numbers didn't match what the TM says, but they did vary Stupid thing is, step M says if the tests I completed showed up as they "should" in each step that the box is bad. It...

I saw somewhere in my searching that someone mentioned much better wiring diagrams are located somewhere, the ones in the manuals are less than great, and honestly, make little sense to me. Of course now I can't find the mention of those diagrams...

Only getting about 9 volts between F & J

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No

It didn't, but now it does start/run correctly, it MAY have been related to low voltage, I have been in the process of charging the batteries and I guess they were strong enough to turn it over but was not enough voltage to power the other stuff. Just no readings on Hz or voltage gauges now.

I tested the magnetic pickup as stated. Correct, Hz gauge reads nothing.

The fuel shutoff is the governor actuator, I wasn't expecting an electronically controlled governor, I expected wrong... On the side of the engine connected to injector pump. I have not adjusted anything behind the front panel, when I say I adjusted the Hz, I used the knob on the front of the...

Just tried this, no luck. Also checked fuse beside voltage regulator. Also, the Hz gauge is not reading either, engine speed does change when turning the frequency knob though.

I just tested the magnetic pickup and adjusted it to 3.0 volts A/C. Still no voltage but at least I know that is correct now.

Well it runs now, but doesn't make power anymore... I did the check in the picture below, I was not getting voltage at terminal 5, and voltage elsewhere was low when cranking, about 15 volts. I hooked up slave cables to see if that helped and although it didn't start the first time, it did...

I have done some searching on the crank sensor, can't find anything on it either. I did adjust it in to where it was barely off the flywheel gear. I found something in the manual to check the "internal crank relay test', checking the governor control, so that's next on the list.

So I assume the crank sensor just senses the rotation of the engine and then allows power to the shutoff? I will check it shortly, thank you. I won't be firing it up anymore, I basically just did that to confirm in my head that was the reason it would not start.

Have I mentioned I hate looking through the manuals? I have been searching on liberated manuals but when I search for "MEP-804a" about 300 manuals come up. I am also hate when I download one, then spend time finding the troubleshooting section for it to tell me 'go to next level manual'. I...