I ordered some LED stop and turn signal lights to mount up high on the rear of the travel trailer. Original plan was to run the wires along the outside surface of the travel trailer. I had planned to cover the wires with a wire cover track from one of the big box stores. I don’t like the thickness (too tall) of the covers. Re thinking this track idea. So now, I’m starting consider running the wires behind the skin on the rear of the rv. I have pushed on the skin between the corners and the window. I’m not finding and horizontal supports in this area. I think I’m safe to snake the wires through this area. I've never done this before. I would have to cut a hole large enough to guide the snake next to/along the backside of the skin (trying to stay out of the insulation). To cut a hole, I assume I would use a hole saw with a pilot drill adjusted close to the saw’s teeth ( keep pilot drill from drilling too deep). I’m thinking I need a hole large enough to guide the snake along the backside of the skin(not sure how to enlarge the hole as needed to guide the snake).Now, my fears… Cutting an ugly hole and I can't get the wires snaked to where I need them. I’m adding these lights so vehicles farther behind me can see what I’m doing. Any thoughts? Thanks! Pat

I'm assuming, I can find a snake that will work.Pat

Its probably not a big deal but I would check with the DOT/DMV office first to see if what you want to do is approved for your local state...Hate to pay out for new lights and then have to remove them to pass your state inspection...I do know the lights must have a DOT approval numbers stamped on the lens... Another issue is your license plate holder requires a light on it above the License plate on the rear...Used to run into this all the time back in my OFF-ROAD JEEP Days...Roy Ken

A fiberglass snake is about 1/8" diameter so a small hole will do the job. Remove the marker light to perhaps test the snake. Ditto for any thing inside in the general area. Going through insulation would not concern me.

JayPat- I would not bother; your lights are pretty high up. I just did this on my toy hauler where the lights are bumper level. It was a pain but now I have lights at the top of the trailer. Yours are fins - following vehicles should be able to see your lights.

Also consider the window for access. You might for example be able to remove just the inside trim to get good access.

Adding higher, stop and turn signals on tt. | Good Sam Community

Bmach
Explorer II
Jul 04, 2017
I saw a utility trailer that had three factory installed brake lights going up each side. You could not miss it.
Jay_Pat
Explorer
Jul 04, 2017
I ran the wires on the outside of the skin.
Covered with eternbond.
I need to post an image.
Pat
Jay_Pat
Explorer
Jul 04, 2017
73guna wrote:
I like what your doing.
I drive OTR and anytime someone lights up the back of their vehicle for the reasons you provide, gets a thumbs up from me.

Thank you!
Roaming_the_ear
Explorer
Jul 02, 2017
Here is the best thing I ever did, LED flashing bulbs, they flash 3 times real fast, then solid:

https://www.superbrightleds.com/moreinfo/tail-brake-turn/1157-led-bulb-w-brake-flasher-dual-function-1-high-power-led-bay15d-retrofit-car/923/2274/

or:

https://www.superbrightleds.com/moreinfo/tail-brake-turn/3157-led-bulb-w-brake-flasher-dual-function-1-high-power-led-wedge-retrofit-car/924/2275/

All of my vehicles have these. Although, I'm not sure if they will work on lights that use the same bulb for the brake and turn signal. (All my vehicles have separate turn signals from the brake). Motorcyclists love them, especially when riding with groups. They are definite attention getters.

OP, I like what you are doing, I've always wandered why the RV manufacturers didn't at least put the 3rd brake light on them, I'd gladly pay the small amount extra it would have cost.
spoon059
Explorer II
Jul 01, 2017
OP, how about taking off the outside upper market light and trying to fish your tape down to your existing taillight hole. That way you know if you can fish behind your wall BEFORE you drill holes.
73guna
Explorer
Jul 01, 2017
I like what your doing.
I drive OTR and anytime someone lights up the back of their vehicle for the reasons you provide, gets a thumbs up from me.
Jay_Pat
Explorer
Jun 18, 2017
Bumpyroad wrote:
I'd prefer using a white plastic channel myself. would look less "tacked on".
bumpy

I'm going to look around for some channel, again.
Do you have any suggestion?
Thanks! Pat
Bumpyroad
Explorer
Jun 18, 2017
Jay Pat wrote:
I had another thought......That's unusual!
Considering, running individual wires from the old fixture, up and to the new fixture on the surface.
Then cover the wires with Eternabond.
So, everything is surface mounted with no new holes anywhere (except to mount new fixtures with screws).
Could be a win, win...
Pat

I'd prefer using a white plastic channel myself. would look less "tacked on".
bumpy
Jay_Pat
Explorer
Jun 18, 2017
I had another thought......That's unusual!
Considering, running individual wires from the old fixture, up and to the new fixture on the surface.
Then cover the wires with Eternabond.
So, everything is surface mounted with no new holes anywhere (except to mount new fixtures with screws).
Could be a win, win...
Pat
Jay_Pat
Explorer
May 30, 2017
jake2250 wrote:
It makes your Whole rig visible to the traffic behind you! Way behind you! Have you ever been in traffic with an Ambulance or Fire truck ahead of you with the new Chevroning on it? You can't miss it! It draws your attention and is now a Mandatory requirement on all Emergency vehicles and State and County vehicles. It prevents accidents! I am going to buy two panels and put them on the rear above my tail lights.
You can put more lights on the back of your trailer, but who are you alerting? Ten vehicles back? Three vehicles back? I would like to install amber turn signals mid way down the side of my trailer so vehicles on the side of me can see my intentions, Matter of fact looking at my trailer now I think I can mount them on the Wheel fenders.
Another thing you can do is install a Brake light flasher, when you step on your brakes the brake light flash quickly for a few seconds then stay on until you release the brakes, it gets attention!

Please, post an image when you are finished.