Full Build Wiring Kit | Pre-Wired Plug & Play Harness for Van Conversions

Simplify your van build with our Full Build Wiring Kit – a pre-wired, plug-and-play solution designed by professional installers for Sprinter, Transit, and Promaster conversions. No more guessing wire gauges or buying massive spools—this kit is pre-manufactured, labeled, and ready to install, saving you hours of frustration.

Why Choose Our Wiring Kit?

Pre-Wired & Pre-Loomed: Ready-to-install harness reduces wiring complexity and speeds up your build.
Marine-Grade Durability: Made from copper-tinned marine-grade wire, resistant to corrosion and capable of handling higher loads than standard wiring.
Professional Standards: Built to ABYC standards, with wire gauge matched to safe load limits.
Plug & Play Ready: All wire ends are heat-shrunk, pre-stripped, and terminated with Wago connectors for simple appliance hookups.
Compatible Systems: Works with EcoFlow, Renogy, Serg Supply Sequoia Power System, and most portable power solutions.
Designed for Vans: Intended for driver-side power system layouts common in Sprinter, Transit, and Promaster builds.

What’s Included in the Kit

(1) Power to MaxxAir Fan Wire (15A Max)
(1) Power to Diesel/Gas Heater Wire (15A Max)
(1) Power to Dimmer Feed Wire (10A Max)
(2) Dimmer-to-Light Wires (5A Max each)
(1) 110V Wire with Wall Outlet (15A Max, must be connected to GFCI)
(1) 110V Wire to GFCI Outlet – Long Run (15A Max)
(1) 110V Wire to GFCI Outlet – Short Run (15A Max)
(1) Double Dimmer Switch (5A Max per dimmer)

Outlet Types:

Wall outlet enclosure for standard walls.
Deeper GFCI outlet pair for cabinet cut-in installations.

Technical Specs

Voltage Rating: 12V DC & 110V AC only
Not Compatible With: 24V, 48V, or 220V systems
110V Outlet Capacity: 1800W Max per circuit
Wiring Lengths: Pre-cut and labeled for van layouts
Safety Margin: Designed with extra capacity for slightly higher loads

Installation Notes & Best Practices

Mount wiring securely with proper strain relief.
Protect wires passing through sharp edges with grommets or conduit.
Heat-shrink connectors whenever possible.
Always fuse and ground circuits properly.
Place breakers inline on all 110V circuits as redundant safety.
Test all circuits before final installation.
Never splice into these pre-made wires for additional circuits.
Do not use Wago connectors for 110V AC circuits.

Installation Difficulty

Skill Level: Moderate (basic electrical knowledge required)
Time Required: Varies depending on system setup
Tools Needed: Wire strippers, crimpers, power drill, multimeter

⚠ Important Safety Disclaimer:
We are not electricians. Please treat all circuits as live and dangerous. Even the best wiring cannot prevent fire hazards if improperly installed. Wiring components are non-refundable.

✅ The Full Build Wiring Kit is the fastest and safest way to wire your Sprinter, Transit, or Promaster conversion. Designed by installers, made with marine-grade wire, and fully pre-loomed for easy routing—this kit takes the guesswork out of van wiring and gets you closer to hitting the road.