Custom Offroad Wiring Harnesses Built for Your Vehicle

Fastline Wiring & Fabrication designs and builds custom wiring harnesses for offroad vehicles, race trucks, UTVs, Jeeps, prerunners, rock crawlers and custom automotive builds. From complete vehicle rewires to dedicated accessory harnesses, every system is built around the vehicle, components and electrical demands of the project.reas

HP Academy certified

Certified Wiring Expertise.
Practical wiring and harness construction
Reliable professional electrical systems for every build.

  • Custom wiring harnesses
  • Dual battery systems
  • ECU and engine wiring
  • Jeep wiring
  • UTV wiring
  • Wiring repair
  • Accessory wiring
  • Fuse and relay panels
  • Troubleshooting

Built for offroad conditions

Offroad vehicles experience extreme vibration, dirt, mud, and heat. We use high-quality wiring, proper loom, sealed connectors, heat protection, and secure mounting to ensure your wiring system holds up in the toughest conditions.

Our wiring is built using professional motorsports wiring techniques to prevent electrical failures and make future service simple and organized.

We build custom wiring harnesses

  • Offroad Race Trucks
  • Prerunners
  • Rock Crawlers
  • UTVs
  • Jeeps
  • Overland Vehicles
  • Automotive Shops
  • Race Teams
  • Custom Builders

Contact Us

Contact Fastline Wiring and Fabrication today to discuss your project
  • Custom Wiring
  • UTV Wiring
  • Jeep Wiring
  • Race Truck Wiring
  • Wiring Harness
  • plasma cutting
  • fabrication
  • Phoenix
  • Mesa
  • Chandler
  • Scottsdale
  • queen creek
  • santan
  • gilbert

Copyright © 2026 FastLine Wiring & Fabrication. All Rights Reserved