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As soon as I can find a way to get at the PCR without the probe sticking up.

The PCR is powered from N1. The starter relay from N2. Scale is always 2V per div, I am moving the PCR and starter relay trace down, after the capture.

This is before I moved the PCR and starter traces down a bit.

This is a rough number starter current is 360 A. This is from a clamp on amp meter.

Now I have a good trigger. See all the ringing in the green trace.

Same capture I moved the green trace down.

green trace is the starter relay.

Same as before with bottom trace, looks like starter relay GND.

The terminal near F42 measures 36 ohms to GND. I found two terminals near starter relay. You can see one in the picture that Jerry posted. Top center of picture.

That is the terminal. The relay that runs the PCR is on the PCB. I think that is what it is. I was going to get channel 4 on starter relay. Will get the ESS restart today.

I was going to probe F42 then I found the terminal next to F42

I know what the fuse is, not sure what the terminal near it is. The lower trace is the terminal in question.

Top trace N1 and N2 lower trace is terminal near F42. Not sure what it is.

Ozone eats rubber and plastic.

I went from Arizona to Washington with a current meter on my battery and alternator. Never more than 25 amps into the main battery. The current meter on the alternator had 130 amps max. To be clear two current meters one on the battery and one on the alternator.

Max charge current for AGM batteries is 30% of capacity, for 100Ah 30 amps.

Max voltage for AGM battery is 14.8 V. Your batteries are damaged for sure. The alternator charges the jeep batteries at about 20 A max. My guess is that the jeep is never going to be happy, putting 60 A into a converter. DC to DC converters make large spikes on the system, computers do not like...

Temp outside = 88 F, coolant 210 F (dash gauge), oil 220 F (dash gauge). At 65 MPH temp below vent 137 F, 40 MPH 145 F, 30 MPH 150 F, stopped 175 F. I had good correlation between speed and temp below the vent, higher speed lower temp. There is a probe sticking out of the vent into the outside...

I am going to find out. Four channels oil, radiator, air into vent, and air out at bottom of vent.

Three years no problems. My phone warns me if my battery is low, BT battery monitor.