Hi JJ, I “think” Pete’sMH may have been talking about the dual voltmeter unit that you can find on Amazon.com for monitoring your coach and chassis battery voltages simultaneously......with a bit of wiring, safety fusing and an on/off switch. Link below if it works:
https://www.amazon.com/MICTUNING-Dig...s%2C280&sr=8-3
Regarding the jacks, I think you are correct in that you need to reset (or set) the level setting on the jack controller as a start. I hope your slides are an easy fix when weather permits.