DIY Teardrop Trailer Frame Wiring Harness
A DIY wiring harness on a teardrop trailer should perform well for years, use the frame to protect and attach it, and should be mostly hidden. There is nothing more frustrating than being all loaded up and ready to camp only to find that your tail lights or side markers are not working. Usually that is due to poor parts and installation.
The goal of this kit is to give you the exact high quality parts that go into commercial teardrop trailers and the added peace of mind that these parts should perform well for years to come (when installed as I recommend).
A Reliable Wiring Harness
Quality Parts Matter
“Trailer wiring shouldn’t suck.” – Mark
Features of the DIY Wiring Harness for Teardrop Trailers
DIY Teardrop Trailer Wiring Harness
Trailer wiring gets a bad reputation mostly because of poor quality parts and poor installation and use practices. This harness is the best parts and the same diagram that is used in commercial teardrop trailer production at Overland Trailer.
7 Blade Wire & Junction Box
Pre-Wired & Ready to Install with Grommets for weather proof. The Junction Box has a lid with a weather proof lid.
100% Pure Copper Wire
Most RVs use an imported copper-clad aluminum wire that isn't as reliable as pure copper made in the USA. This is the best!
Harsh Environment Mounts
Harsh environment wire mounts keep wires up closer to the bottom of the trailer body. Harsh environment makes them resistant to UV light, chemicals and tearing.
Heat Shrink Butt Connectors
Butt connectors crimp wire connections together and shrink for a waterproof seal when heated.
Unplug the trailer and put the plug into this holder. It protects it from moisture out of the plug and keeps it off of the ground.
All ring connectors for the junction box & waterproof shrink connectors are included...and then some!
The same diagram used at Overland Trailer in manufacturing.
DIY Teardrop Trailer Harness Options & Part Lists
|Part:||5' x 8' Trailer Harness||5' x 10' Trailer Harness||6' x 10' Trailer Harness|
|Harsh Environment Mounts & Zip Ties (QTY)||25||30||40|
|12 - 10 AGW Heat Shrink Butt Connector (QTY)||8||8||8|
|16 - 14 AGW Heat Shrink Butt Connector (QTY)||4||4||8|
|7-Way Junction Box With 8' Wire & Seven-Blade Plug (QTY)||1||1||1|
|7-Blade Plug Holder (QTY)||1||1||1|
|14 - 16 AGW Heat Shrink Ring Connectors (QTY)||2||2||2|
|10 - 12 AGW Insulated Ring Terminals (QTY)||25||25||25|
|14 AGW Copper Wire - RED (FT)||7||9||9|
|14 AGW Copper Wire - GREEN (FT)||25||28||35|
|14 AGW Copper Wire - WHITE (FT)||25||30||33|
|14 AGW Copper Wire - BROWN (FT)||13||15||17|
|1/2" Split Wire Loom Conduit (FT)||30||35||33|
Teardrop Trailer Frame Wiring Harness for the DIY'er
- Heat Gun
- Philips Head Screw Driver
- 8mm socket
- #2 Philips Screw Driver
- 1/4″ Standard Screw Driver
- Plus, wire cutters, crimpers, and strippers
- The Overland Trailer Wiring Toolset includes all of these tools that fit these parts.
Simply put, a 7 blade RV plug is:
- Durable – wires are well protected and don’t break easily
- Expandable – It is easy to add trailer brakes, a 12V battery charge line, or backup lights/other accessories with the 7 blade plug.
As I say in my Expert Tips Video Lesson, it is good to future-proof a teardrop trailer build. Let’s look at a few example scenarios.
For instance, you may not want trailer brakes right now but you might in the future. With this plug, it is an easy addition to your wiring harness to add a brake system.
Another example is that you like the idea of charging your teardrop trailer from your tow vehicle when driving. 12V power an easy addition to this wiring harness. Save yourself future headaches.
It’s super solid already but if you want extra peace of mind, I recommend putting a small screw in the middle of each harsh environment wire mount. Drill into the frame, or teardrop trailer body, and apply mount adhesive, and drive a screw with an impact driver.
If installed as we recommend, our commercial trailer wiring harnesses typically last 10 years and longer with regular inspections and minor maintenance.
When installing the kit, it is best to avoid -as much as possible – sharp edges, sharp bends, and running wire in areas that could be exposed to collisions with rock and debris when driving.
All connections outside of the junction box are designed to be waterproof. The junction box is water-resistant not 100% waterproof.
Solutions are to either mount the junction box in a dry location or use additional silicone sealant (with regular inspection) to seal the box. Also, ensure all lights are submersible and connections outside of the junction box are shrink connections.
How do I duplicate your recommended installation?
If you’d like a step by step installation of this kit with all of my tips and tricks learned over years of trailer production, consider getting the trailer frame wiring plans & parts bundle.
Not at this time. Sometime in 2021, we will be able to accommodate custom sizes.