2000 SeaBreeze will not start/ turnover

[Majatu25]

Hello all, I am hoping to find some help. So a few things have happened first our hydraulic jacks and steps stopped working. We looked and the manual and it said to reset the 150 amp breaker on the BCC. We have a hell of a time finding but found it and it did not work. BTY our BCC is not original to the RV, we have a custom BCC. Well the next day our motorhome will not start at all, it will not even turnover. We checked the batteries ( we 1-12v and 2-6v) the each 6 v read 6 and our 12 v read 12.4. Our light and everything work inside the house and on the dash. We are thinking it could be a solenoid. Also none of the ignition switch fuses have power to them either. Any ideas??? Please help we are at a loss.
Dee.

[MrMark52]

Welcome to the board Dee!

Sorry to say, there isn’t a magic bullet remedy that anyone can give you to tell you what’s wrong.

You’ve made a good start by reading battery voltages. And while the readings you’ve given are not conclusive that your batteries are good, it does mean chances are you need to look elsewhere (as you suggest).

The 12 volt battery is probably our chassis battery - chassis batteries power the engine and all chassis related components (like the dashboard).
The 2 6 volt batteries are probably your coach batteries and power the coach, like lighting, refrigerator, etc.

Have you tried the Emergency Start switch? If so, what happens? If nothing - it’s very possible you have a bad ground somewhere, wither at the battery or where one or the battery cables bonds to the chassis.
Do your headlights work? If yes, then you’ve narrowed the problem to the ignition switch and starting circuit. If no, then there are more worms in the can to chase.

Locating your issue is going to take a meticulous following “like a map” of the chassis wiring diagram to find where your issue is.
Whose chassis is under your coach, and do you have the wiring diagram for it?

[Ray Lenning]

If you have a Workhorse chassis check the fuses in the fuse box behind the hood opening.

[John Wayne]

For a quick check of a bad ground take a set of jumper cables hook the black cable to the neg post of the battery and the other to a clean area of the frame of the MH. And see if any thing changes when you try to start. You do not have to hook up the positive side of the jumper cables.