UNIVERSAL 21-CIRCUIT+PRO PLUS AUTOMOTIVE WIRING HARNESS

Take the hassle out of rewiring your vehicle with our 21-Circuit Pro Plus Series Universal Wiring Harness — designed for custom builds, restorations, street machines, muscle cars, hot rods, trucks and wagons.

This complete universal wiring system is ideal when you need to operate all your standard running gear plus aftermarket accessories, including EFI engine management, electric fans, central locking and power windows.

Designed with easy installation and future expansion in mind, the Pro Plus Series uses quality automotive wire and components to provide a reliable foundation for your vehicle's complete electrical system.

Extra-Long Harness for Bigger Builds

Our Pro Plus Series features extra-long wire leads, making it an excellent choice for longer vehicles such as trucks, wagons and muscle cars, while still being perfectly suited to smaller custom and classic vehicles.

From headlights to taillights, the pre-wired fuse block provides a central electrical system for your entire vehicle.

Compact Fuse Block

The harness features an ultra-compact fuse block designed to provide greater flexibility when choosing an installation location.

Using the supplied extended mounting bolts and steel mounting bracket, the fuse block can be positioned in a variety of locations, including under the dashboard or beneath a seat, depending on your vehicle and installation requirements.

21-Circuit Wiring System

Circuits are provided for common vehicle electrical systems including:

• Headlights
• Turn Signals
• Hazard Lights
• Horn
• Wipers
• Gauges
• Radio
• Stop / Brake Lights
• Air Conditioning / Heater
• Power Windows
• Central Locking
• EFI / Engine Management accessories
• Fuel Pump
• Electric Fan
• Ignition and accessory circuits

Original steering columns can also be incorporated using the supplied mating connectors and terminals.

Easy-to-Identify Wiring

Each wire is labelled approximately every 5 inches (127mm) along its entire length, making circuit identification easier during installation and future servicing.

The harness uses GLX 125 high-temperature polyethylene-jacketed automotive wire, designed to provide resistance against grease, oil, acid and petrol.

Kit Includes

• 1 × 21-Circuit Universal Wire Harness
• 1 × 30A Headlight Circuit Breaker
• 1 × Horn Relay
• 1 × Accessory Relay
• 1 × Fuel Pump Relay
• 1 × Electric Fan Relay
• 2 × H4 Headlight Plugs
• 1 × Alternator Plug
• 2 × Steering Column Plugs
• 1 × Firewall Rubber Grommet
• 1 × Extra Black Negative / Earth Wire
• 1 × Neutral Safety Switch Wiring
• 1 × Fusible-Link Alternator Charging Cable
• 1 × Fusible-Link Battery Supply Cable
• 1 Pack × Ring Terminals & Crimp Connectors
• 2 × Fuse Box Mounting Bolts
• 1 × Steel Mounting Bracket
• 1 Pack × Cable Ties

Also included are the required horn relay and connector, turn signal and hazard flasher relays, dimmer switch connector, ignition switch connectors and more.

Steel Mounting Bracket Dimensions

Length: 225mm
Width: 130mm
Height: 100mm

Firewall Rubber Grommet Dimensions

Firewall Hole Cut: 30mm
Inner Hole: 25mm
Outer Diameter: 38mm

Part Number

BWA21KIUP

Additional Parts & Technical Support

Twin H4 Headlight Connectors:
H4 Globe Headlight Connector Pair

Wiring Diagram:
A downloadable PDF wiring diagram is available through our Bluewire Automotive Tech Support page.

Important Installation Information

Our universal wiring harnesses are designed with straightforward installation and easy-to-follow instructions. However, automotive electrical systems can involve high-current circuits and vehicle-specific requirements.

For the safest and most professional installation, Bluewire Automotive recommends having the wiring harness installed or checked by a qualified auto electrician.

Bluewire Automotive – Wiring Solutions for Street, Race, Restoration & Custom Builds