American Autowire Highway 15 Plus Universal Wiring System
American Autowire Highway 15 Plus universal wiring system | 15 circuits | Part number 510825
Questions on availability or lead time? Contact Fesler USA before you order and we will confirm it for you.
The Highway 15 Plus is the 15 circuit version of American Autowire's flagship Highway 22 Plus. It is designed for builds that do not need a large fuse panel: 15 fully labeled circuits, high-temperature GXL wire, and a compact fuse panel for clean routing in tight spaces. A strong match for street rods, kit cars, and roadsters.
15 CIRCUITS. COMPACT PANEL. LED READY.
Why builders choose the Highway 15 Plus
- Compact footprint: The panel base measures 4.5" x 4.5", so it tucks into tight spaces.
- Built-in LED flasher: Supports LED turn signals without buying a separate flasher.
- High amp alternator and main power connection kit: Uses 6 gauge wire and two 175 amp Megafuses to support high amp alternators and protect the panel and charging system.
- Additional ignition circuit: Supports aftermarket components.
- Improved ignition switch: Includes a mating connector and 4 additional accessory and ignition terminals. Uses a square GM-style key.
- Four-headlight support: Extra connectors and wiring are included, with no add-on purchase needed.
- Back up light feed and power wires: Makes the harness easier to install in a more modern vehicle.
- Longer neutral safety wires: Sized for cars with console shifters.
What's included
- 15 circuit fuse panel with built-in LED flasher
- GXL/XLPE GM color-coded wire, labeled every 3 to 4 inches
- Ignition switch with mating connector, headlight switch, and dimmer switch
- High amp alternator and main power connection kit (6 gauge wire, two 175 amp Megafuses)
- American Autowire gauge cluster disconnect
- Connectors and wiring for a four-headlight system
- Full-color, tabloid-size, step-by-step instructions
Specs
Fitment
This is a universal wiring system, not a vehicle-specific plug-in harness. It suits street rods, kit cars, roadsters, and other custom builds that want a compact panel and do not need 22 circuits.
Running a long accessory list? Step up to the 22 circuit Highway 22 Plus. Contact us and we will help you pick the right kit.
Installation
- Instructions: Full-color, tabloid-size, step-by-step instructions are included.
- Wire identification: GM color-coded wire with labeling every 3 to 4 inches makes each circuit easy to trace.
- Service access: The gauge cluster disconnect lets the cluster be unplugged for service.
- Professional installation recommended if you are not experienced with automotive electrical work.
Frequently asked questions
How is this different from the Highway 22 Plus?
The Highway 15 Plus is the smaller, 15 circuit version of the Highway 22 Plus, with a more compact 4.5" x 4.5" panel base. It is meant for builds that do not need a large fuse panel.
Will this kit run LED turn signals?
Yes. A built-in LED flasher supports LED turn signals without buying an additional flasher.
Can I use a high amp alternator?
Yes. The included alternator and main power connection kit uses 6 gauge wire and two 175 amp Megafuses to support high amp alternators.
Are switches included?
Yes. Ignition, headlight, and dimmer switches are included. The ignition switch comes with a mating connector and uses a square GM-style key.
Is this harness made for one specific vehicle?
No. The Highway 15 Plus is a universal system for custom builds, not a direct-fit harness for one make or model.
Rewiring as part of a full interior build?
Plan the wiring alongside your dash, gauges, and panels. Browse Fesler interior products.
Questions about circuits, fitment, or which kit suits your build? Contact Fesler USA. We will help you plan it right.
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