I had trouble some time ago with the Big Boy relay not doing it's job, so after some research, I removed an cleaned the contacts of the big relay. Problem solved for almost a year.
Now I notice the chassis batteries are not receiving a charge hooked to shore power, 11.9 volts. Good charging rate with the engine running, 14.2vdc. House batteries are staying around 13.8 vdc while hooked to SP. Have load tested all batteries, good.
Thru research here I understand the ISO Green LED light in the Rear Run box should be lit, and a "hum" from the BB and it should be warm. Mine is not.
The question I have is what controls this part? Is there something that turns it off?