Electrical panel help -2013 Sunova 35G

[Sunova121]

Hello


I just completed the replacement of the BIM on my 2013 Sunova. When I first started down the rabbit hole, my friend said that I needed to disconnect all power including the batteries and remove the electrical panel. He said it was easy and that all the wires behind the electrical panel were on disconnect clips so not to worry. There were a few disconnects in there and a couple of 5 amp fuses, but many of the wires from the electrical panel would have to be disconnected to make room to access the BIM. As I disconnected the wires, I labeled them and then had to wait for the BIM to arrive. (couldn't locate locally) After I replaced the BIM and started to rewire the electrical panel, a couple of the taped labels came off.


Does anyone have a picture or a wiring diagram how the wires on the back of the electrical panel RV Electrical panel.jpg should appear? I called the mobile RV repair person and they are 3-4 weeks for an appointment and I was hoping to take the wife camping over Valentines Day.


Thank you so much for any advice or photographs!


Bruce,
Tucson, AZ

 

[Morich]

Yes, there should be exactly what you need online!
First thought is there should be labels on the small type wires in the RV!
Like this?

Then as a way to "decode" that info, we have this list, showing "from" and "to"
locations of the wires!
https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/electrical_guide.pdf

Since you are likely dealing with two wires and they BOTH came off the panel, that may not help as it likely tells you that but not WHICH fuse on the panel?
Sheet 2 of this drawing may be the key to follow and find which fuse.
Be aware that this gives the view from the back side and that means it is reversed as we look at it from the front.

But this may not be a clean and clear as we would like! I looked at one for the label "ER" and what the list shows may not be the same as the fuse label shows! ARRGH!
The "Electric step kill switch" may not sound the same as "electric step ignition"??? So some pick and choose is going to be needed in some cases!
But maybe for two wires, this gets you there?
Can you match the wire labels to the circuit ID on the lower drawing of the back of the panel on sheet 2?

But if this is still a problem, looking at what is likely to be missing is power to two circuits. If you look at the labels on the fuses, can you then find those two items dead?
Perhaps connecting one wire to power it up and then check to see if that makes the correct item jump to life?

Sorry, I have looked there but it has been too long and I have no idea what I actually saw back there! Foggy memory throws in lots of doubt, but see if this gets you there?

They stopped giving us the full 12volt coach wiring info after the 2010, so we have to look harder and hunt and peck more!
Good luck on the bug hunt.

 

[Sunova121]

Thanks!

The wires that I need to confirm are a couple of the large black cable type wires. Some had purple dots or yellow stripes around them. I don’t think these had any markings on them, but I will check.

 

[Morich]

In a rush, I think I left out the drawing number that I referred you to!
https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/2013/13_wire_180347.pdf

Sheets 1 and 2 for your 35G!

HUMM?
From that description, I might guess those may have come off the BIM???
Can you possibly look at this drawing of the BIM wiring and see what points might be missing wires?
Or are there any fuses on the panel without a wire on the back?

 

[powercat_ras]

Look at sheet. Note that not all wires have the printed wire IDs, some are identified with colored tape wraps.

2013 Sunova 35G Chassis Electrical Box

 

[Sunova121]

Hello.
I put everything back together, and when I started the rig up, the coach and house batteries were charging, so the BIM is working.
The three slides went out and came back in.
When I turned on the generator, I did not have 120 power to the microwave or the air conditioners. I’ll have to study the diagram better to see what I did incorrectly.

 

[Morich]

Okay, that will be a second problem and likely at a different set of breakers or fuses as both those items are 110AC , not part of the BIM, etc. which is 12VDC with batteries involved.
Maybe take a look at these breakers at the load center inside? Looks like under the bed?
Click this snip to get a better view or go direct here on sheet 5:
https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/2013/13_wire_183541.pdf



Good luck! It's a tangled web at times!

 

[Sunova121]

Morich and PowerCat_ras.

Thank you so very much for all your help! Turned out that I rewired the panel correctly. When I turned on the generator, one of the generator breakers tripped and why the microwave and ACs would not work. I blew up the diagrams you provided and sealed them in plastic and will store them in the fuse panel compartment in case I need them again for reference.
Again. Thank you again!!!

 

[Morich]

This BIM area is where a lot of good things happen-- or not!
It is a place that takes a lot of abuse as it operates every time we start the engine and it does several different things that we may need to know about.
This is what connects coach to chassis to charge as we drive OR if we have a weak chassis/start battery, we can push the dash switch to connect them for a "jump start"!
I think of this BIM as two sections, coach on left and chassis on right! Power from either battery comes to BIM, safety items that stay hot are fed BEFORE the disconnect while things that DO get cutoff are fed AFTER disconnect relays.
This is why we can still run batteries down when stored as some items are still connected to drain battery!
Wires I marked blue are battery (LR) and ground(FM) from the front to control the BIM to connect both together!

Best of luck to you and hope you NEVER have to look in here for trouble! We got enough without looking for it!

 

[creativepart]

Sounds like you've got this handled. I have an Adventurer (2017) so it's similar but not exactly the same. Here's what my BIM looked like when I removed it to install LFP batteries. At first I thought this was impossible to figure out... but actually, it was quite logical when I got into it.

 

[Morich]

Good clear pictures are always good to help convert what we may see on drawings to what we actually mi8ght see when we get into the issue!
And We do get some pretty good info from Winn if we can collect the right spots to find that info??
A couple points to keep handy if we plan to DIY more later:
A list to decode the ID stamped on small wires

https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/electrical_guide.pdf

They've just relisted this info and there is a point where they missed as the list starts on page 2, skipping the really most important wiring!
Winn starts the ID list with single letters. (A,B, C,)
Those are often the most basic and most critical wires. Like wire J will be the lead from battery to the main buss bar, etc. !
Then they move to two or three letters as you move out further along a circuit in many cases!
That can help when you find an ID on a wire or drawing as it gives a hint of the importance of that wire!

So I marked the ID as found on the small wire in lower right of this picture. It was the only one I could see and use as an example! I think it shows LLK?
So we first think it is not a terrible "main wire" due to three letters. Then we can go to the list and find where LLK goes from and to!

It's a number 10, yellow wire that goes from a breaker panel to a control module for a left hand front slide! Not actually part of the BIM, etc. but just happens to hang off the fuse panel and look like it has something to do with the BIM!!
Not a big important wire in the overall plan but really important to know if that slide is not working!
But we have more info on battery cables and ID here:

But that can also open up a whole different can of worms that we always need to keep in mind!
We always have to be open to the idea that what we should expect may have been changed!
The info was written when they used mode solenoid instead of the BIM! So we need to stay alert for changes over time!