Camper electrical wiring diagram?

[pckelley]

Hello. I'm new, haven't found a similar post.
2019 Coleman Lantern 250TQ. I'd like to add a new Maxxair 7500 vent fan to the rear roof, somewhere above the Happijack queen bed. About half way back from the roof AC unit to the rear of the trailer. Before I cut the new hole, I'm trying to find a diagram of any wiring that might be in the way. I called Keystone and they send me a drawing of the AC ductwork in the ceiling, but they don't have any information on where wires might be running.
Anyone have tips? My gut tells me I should be in the clear, most 'important' electrical stuff is forward of the area I'd like the fan to be.
thank you in advance for any ideas.
And, I do also plan to upgrade the bath vent with the same fan, but I've read that having two can be a game changer with air exchange and keeping the camper cool...we do like to boondock and the battery setup we have now won't run the AC.

 

[chuckster57]

You are aware that you will need to install framework? I surprised you got any drawings, I wish you all the best, it’s not a project I personally would attempt.

 

[NH_Bulldog]

In my 2019 Passport, I had contemplated installing a roof vent with fan in the ceiling of my front bedroom above the bed where nothing previously existed. Once I did a little exploration and discovered I had a very thin roof sheathing and stamped steel rafters, I decided to let it go and did without due to the logistics and extensive work involved for very little benefit and high probability of negative results.

As an alternative, we added a Heng's Vortex II fan to the existing roof vent in the main living area. When boondocking, we would set the fan to blow out and then close all the windows except near the beds so that the cooler night air would flow in and across us as the warm air was pushed out the roof.

 

[DutchmenSport]

Wires can run any where, and any direction. There is no blue print showing where those wires are located. A right handed employee on a Monday and a left handed employee on a Friday will run the wires completely different on the same make and model of camper. They lay the wires down in a general direction and after that, it's anyone's guess.

The best you can do is make a small hole in the ceiling where you plan to make the bigger hole, shove a snake camera in the hole and see what's there. If nothing is there, then you are free to use that section of ceiling and roof. If you see wires in the way, you may be able to carefully cut open the top or the bottom and move them out of the way. Or, if there is no tolerance, simply put a dab of calking back over that tiny pin-hole, put a spot of paint on top of that, and go to "plan b".

 

[JRTJH]

While these photos are not of a similar floorplan to your trailer, they should serve as an example of how Keystone "runs electrical wiring"... As you can see, what's installed is as likely to run left as it is to run right from the cobweb of wires. For the most part, it seems the "philosophy at Keystone" that what you see is what you get.... You might consider removing one of the 12VDC ceiling lights and using the hole Keystone cut for those wires to insert a borescope camera and have a "look around" at what's above your luan ceiling panels. Use caution if there are any air conditioning ports/vents in the area, you likely won't be able to navigate a borescope around those ducts to see the other side...

 

[jxnbbl]

I've made different modifications to my trailer that require "making holes". To do this, I would scope by taking down a light or something that is already there. I use something like this to do this and inspect the area. Sometimes you have to make a 'small hole' then push wires aside, etc to do what you want.

LINK

 

[Pathfinder75]

Regarding TWO fans. I've always installed or replace vents with two 7000K MaxxFan Deluxe Fan with Remote. Often if wi dows could remain closed.hav o e fan draw inward and other exhaust. When windows could.be opened then we ussually run same direction to vent.
Agree with others search for proper location borehole or stud finder should help. You may or may not find a.power lead so be prepared to fish.
Definitely build a frame about 14" inch square to put into ceiling same as the one fan you now have. Just copy what Keystone did best you can.
You mention air ducts so I would expect.you can run power from othe fan fishing it in ceiling.to your additional fan.
Should be a fun project. Take your time.

 

[Stircrazy]

While these photos are not of a similar floorplan to your trailer, they should serve as an example of how Keystone "runs electrical wiring"... As you can see, what's installed is as likely to run left as it is to run right from the cobweb of wires. For the most part, it seems the "philosophy at Keystone" that what you see is what you get.... You might consider removing one of the 12VDC ceiling lights and using the hole Keystone cut for those wires to insert a borescope camera and have a "look around" at what's above your luan ceiling panels. Use caution if there are any air conditioning ports/vents in the area, you likely won't be able to navigate a borescope around those ducts to see the other side...

haha, ya it just drives me batty every time I pull the access panel in the front of the 5th wheel and see that mess. one of these days I am just going to clean everything up but I usually forget to make time for it by the time camping season is done.