A few days ago, I replaced 5 house battery cables. The old ones were corroded after all was done, I had no 12 volts into the coach. Turned out I miss-read the battery drawing. A 60” cable going from the house batteries positive side goes to the AUX engine starting switch and the AUX starting solenoid (AUX battery 3 + post).
I had problems trying to pull the old cable out of the PVC pass thru pipe between the battery compartment and the next bay where the solenoid is located. I thought, I will have to dig through the black insulation, goo that hardened so I will get to that later since it’s only connected to the AUX STARTING solenoid…boy that was a mistake!
After a few hours of troubleshooting, checking all kinds of fuses, my attention went to the Battery Control Center or BCC. The BCC has connections to the house batteries, chassis batteries and the generator. I discovered on the BBC, there wasn’t any 13v dc on the house battery post and the no voltage on the generator. There was 13 vdc on the chassis post of the BBC. Looking at the drawing again, I noticed there were 2 connections on the + side of the AUX solenoid.
One connection- A cable between the BBC and AUX starting solenoid was there but the cable I left off that provides 13 volts was not on, the one I deliberately left off…
The BBC box controls ALL the 12 VDC power including house lights, power seats, fog lights, LP gas, generator, Smart AC Voltage Management just to name a few!
I hooked up the new cable between the positive side of the battery AND to the AUX solenoid and then all worked fine. Due to weather, I did not attempt to remove the black goo insulation yet and routed the 60 “ battery cable under the coach. I need to soften up the goo insulation then pull out the old cable. By the way, the old 60” cable was so corroded, when I loosened up the battery post nut, the ring terminal was almost completely gone. Just image if this most critical cable came off in transit!
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