Total Electrical Mess!

[RV Newbie]

This unit was vandalized and we're trying to rebuild it. The fuse box, furnace, fireplace, microwave, etc. I have no wiring diagram and bought the unit in this condition so I don't know what it is supposed to look like. The thieves just cut wires everywhere. I have 2 batteries connected at the front of the RV, however, I have no 12v supply to the fuse box. The battery disconnect is intact, but has no effect in either position. Any chance there is a 2023 MY wiring diagram available?

 

[RV Newbie]

 

[RV Newbie]

The junction block at the very top of this picture has a B- and P- marking on it. The B- side is connected to the negative battery post. What is the P- side supposed to connect to?

 

[RV Newbie]

This is a better picture.

 

[SilentService]

The junction block at the very top of this picture has a B- and P- marking on it. The B- side is connected to the negative battery post. What is the P- side supposed to connect to?

That picture looks like a battery smart shunt to me. The P- is a continuation of the negative side from your battery.
I believe the negative should continue to your fuse box.

 

[Hoopy Frood]

What is it? Brand? Model?

 

[RV Newbie]

It's a 2023 Grand Design Reflection.

 

[markandkim]

Model?

 

[RV Newbie]

Reflection 315 RLTS

 

[markandkim]

Here's the dwg for the 2022 315rlts. Which I have.

 

[markandkim]

This is what it looks like. Was never in a junction box. I thought this was unusual when I bought it new. But GD does this on most of their trailers. Just out in the elements.

 

[RV Newbie]

That's helpful. Thanks. Do you have a picture of the fuse box? This fuse box was stolen so I'm having to install another and I'm working blind without a wiring diagram. Thanks

 

[Soundsailor]

Suggest you reach out to GD customer support with your VIN. They may be able to help you with some sort of wiring diagram. What @markandkim shared above should be helpful, they may be able to share more based on your build.

 

[markandkim]

Here's the ac panel.

 

[markandkim]

Here's the dc panel. It really is installed upside down.

 

[RV Newbie]

View attachment 181898Here's the dwg for the 2022 315rlts. Which I have.

This diagram has been extremely helpful. Thank you!!

 

[RV Newbie]

That picture looks like a battery smart shunt to me. The P- is a continuation of the negative side from your battery.
I believe the negative should continue to your fuse box.

Helpful thanks. Does anyone have a wiring diagram showing the connections for this battery smart shunt? Also, where is the primary chassis ground?

 

[RV Newbie]

On my unit, there are 2 black 6 AWG wires coming off the P- post. However, both are disconnected as I don't know where they go. Currently, it is an incomplete ground circuit.

 

[SilentService]

@RV Newbie. Not knowing what brand of smart shunt you have but most are wired the same. Here is a diagram for my Victron smart shunt;

 

[SilentService]

Here is one that is close to your smart shunt. The only difference is yours is mounted upside down as opposed to the one in the picture: