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If you look in the -24P TM, you will notice that there are 2 switches. Old style, and new style. Try the part and NSN numbers in flebay. I seem to remember seeing one a while back. As for the rest of your list, please start another thread. Will give you more visibility if you do.

Diodes work, or not. I have never seen anything in between. Have seen the same kind of fault you described, in wiring, switches and relays also. Once I had a gen set C-Plug with a pin pushed back far enough to read ohms, AND voltage. But would not pass current. I was on the verge of filling my...

Just looked again. No TB. I assumed. Thats always wrong. You can remove the top of the box. Then remove the TB1, (load terminal board). Then tape up the wires that go to the TB1. Then your access to the S8 is vastly improved.

You can of course test the CB without running the set. CB1 open, no continuity between contacts 3&4, 7&8 and 11&12. CB1 closed, continuity between 3&4, 7&8 and 11&12.

You lost the excitation. That's what. When you started it up, the excitation voltage goes to the main gen. When you removed the C-plug, that removed the initial excitation. I dont think anything else was damaged. Instead of taking the C-plug off, you should have tried to measure at a TB...

Wire #X1A8 on the S6 should be straight out of the main gen to L1 Wire #X3A8 on the S6 should be straight out of the main gen to L3 Wire #X2A8 on the S6 should be straight out of the main gen to L2 Measure from ground to these wires, on S6. What do you get? If I can read the diagrams right...

In the Army, I would have had calibrated test equipment. That's one of the big differences between our worlds. Our test equipment were calibrated at least once, if not twice a year. So if a meter read 0.01, you knew that was was there. I simply do not know if your gear is calibrated. For...

(7) Current Voltage Transformer (CVT1). Using an ohmmeter check three primary windings of transformer (figure 1-1, 6-7.1 and 6, figure 6-9) by measuring resistance from terminals H1 to H2, H3 to H4, H5 to H6, Resistance must be 2.27 ohms ± O.227 ohms. Check resistance in three secondary windings...

The 60 volts should only be inductive voltage I think. Terminal TB3-5 should be pos. The problem I see, is we have not tested the CT's. Or for that matter not the rest of the output box parts. There could be more then one problem here. When you back fed the gen set, all kinds of things can...

Sorry, been over my head a bit. If you apply 24 VDC to TB3, Pins 5&6, while the set is running, the main gen should make voltage. If it will not, then the problem is in the Main gen.

I started reading from the top. I have found a place we made a mistake, or a typo. In post #29 I wrote this...

Open to read comments.

Better picture?

In the -34 TM are instructions on how to test. Open the -34 and go to PDF reader page #150 and start reading.

I know its a PITA, but you can not test the diodes in the set.

To properly test a diode, at least one side/wire of the diode/circuit has to be separated from the circuit. Both sides is what I always tried to do. But at least one side. Read the directions on your tester. If something is not clear, give a shout. Oh, and dont forget to look at the back side...

You got it! Do you know how to test diodes?

Roger!

Need to go to your S1 switch. Pin number 27. Measure from ground to pin 27, on startup. Do you get 24 VDC? If not the S1 is bad. If you get 24 VDC, the the A4 card in the AC output box needs to be checked. The S1 sends 24 VDC to the A4, the A4 sends voltage to the F1 and F2 to light off the...

Roger. That looks good. Now you want to hook up the cable. Then find TB3-5 and TB3-6. You want to mesure between those two terminals, on start up. You need to see 24 volts DC there.