Hey, thanks for getting back to me. I will try that arrangement and tell you what I read.

The thing is, I disassembled all inputs to the 1rec, to test it, as per the suggestion in the EV100 tech manual posted on FSIP. It told me to use a 6volt supply, energize the anode, negative on the cathode, got full ohms, like 30 megs or something, then jump the postive to the gate, thryristor opens, latches, stays open.

Like it's doing exactly that it's supposed to do when it's entirely isolated from the circuit. It's using the resistor capacitor combo of 22 rec and 25 rec coupled to 2rec and 5rec driven somehow by the leads coming out of the logic oscilator board which connect to various parts of those assemblies to control the voltage output going through 1 rec,

I'll be honest, I don't know how it works exactly... I'm not sure if I'm dumb, or if I don't have enough documentation yet to understand the circuit. I mean... I know me being dumb is a part of it, but I'm hoping there's other parts too.

An SRC in isolation without any input is just going to remain closed when you energize the anode with 36-40 volts (well this SRC is cause it's breakover voltage is way higher)

Somehow the logic card and the other SRCs/thyristors (same thing, just bell/ge name vs standard name) are limiting turning off the 1rec thyristor when the t2 (which is the 1 rec cathode) voltage is up to 1/2 the 1 rec anode, which is bat pos, and something in that assembly on this card isn't right, because it's cutting off the thyristor way **** early and it's killing the contact when it's up to only 3.6 volts. Replacing the 1rec wont solve that, because the 1rec is already operating according to the GE tech manual expectation in a 6 volt gate activation test.

as per the GE manual:
well apparently I can't copy and paste, but like functions 11-13 are speed limit inputs. I'm guessing this is something that would be engaged in a few scenarios. One that I'm aware of is when you have an elevated mast value read by the controller, and it limits speed depending on your steering. right? So it does this by having 255 steps, cause it's running an 8 bit binary control machine code i guess, and it's running 256 values, 2^8, and it's starting at 0, ramping up to 255. at.375 volts per step, and it won't let the volts go higher, or it subtracts that voltage from battery, I'm not exactly sure. But it's basically limiting me 10 steps above stopped, if that's the mechanism at play that is preventing me from whatever whatever. It could be something else. but yeah, that's what's going on.

When the guys at the warehouse loaded it, they basically said that they couldn't creep with it, but they knew how to jump it into full battery voltage contact to the motors, so they could load it onto the trailer, but if I can determine what is artificially limiting the voltage output from 1rec, I should be able to get the correct voltage at the t2. Do you think I should just try unplugging leads related to voltage regulation one at a time, and see which one when removed stops preventing regular operation of the 1 rec?