Tripac apu alt code no start

Yes i dont think the sense wire is the problem, i have changed the regulator plug last year. And shows good voltage on sense wire, on board and at the plug

 

Im not chaning between alternators. I have both 120 amp and 65amp . both of them replicate the exact problem which eliminates the alt and both are brand new... My problem is not on the board i am 100% of that.. My board doesnt have a reset button regardless..i have posted some troubleshooting i did early on in this thread.. ..i have bad contact with power or ground somewhere i am 90% sure..Thanks for ur help.I am going to finish it up today

 

It is definatly a possibility, my sense wire is reading same voltage as everything else when trying to start up. It goes from 12.6 volts to when the computer goes to kick the starter on, everything drops to 11.8. Then throws an alt code and never starts... I thought the sense wire is more for when it is already running? Or is that wrong?

 

Ok well I am about to completlly give up on this... I have tried everything mentioned here other than jumping the starter... I dont think there is a way to jump it because there is an entire plug/sensor type going into the solenoid- instead of regular terminals like you would find on any other solenoid ever made in the entire universe.... This ####ing thing is so irritating... I have cleaned everything . Ran new wires from batteries to everything I possibly can.... I don't understand why they make this system so complicated... it's a basic engine that has minimal tasks... there is as much electronics on here as my Cummins... any other ideas are welcome... before I get the angle grinder out and cut the mounting bolts and throw this out in the desert

 

I have changed ground straps multiple times with no luck