Description
The American Autowire 1970 Ford Mustang Classic Update Kit (AAW510243) is a comprehensive wiring solution designed to completely replace and modernize the electrical system of a 1970 Ford Mustang. This kit is built specifically for “resto-mod” projects that require more circuits and a more robust electrical foundation than what the original factory harness could provide. It simplifies the often-complex process of wiring a custom vehicle by providing pre-built, labeled harnesses and modern components that are compatible with a wide range of popular aftermarket accessories and upgrades.
KEY FEATURES AND BENEFITS:
- Complete System Replacement: This kit replaces the entire chassis harness, from the headlights to the taillights, ensuring a full electrical overhaul with all new components.
- Accommodates Modern Upgrades: It is designed with extra circuits and connections to support modern additions such as electronic fuel injection (EFI), aftermarket gauges, high-powered halogen headlights, and power windows.
- User-Friendly Installation: All wires are clearly labeled every 3 to 5 inches, and the harnesses are separated by vehicle section (dash, engine, rear body) to make installation and custom routing easier.
- Enhanced Safety and Reliability: The kit includes an updated ATC fuse panel with modern blade-style fuses, which are more reliable and easier to replace than the original glass fuses. It also features a new headlight switch with an integrated circuit breaker and built-in relays for lights and the horn.
- Steering Column Integration: An exclusive steering column adapter kit is included, allowing the new harness to seamlessly connect with either a stock 1970 Mustang steering column or most aftermarket columns.
SPECIFICATIONS:
- Product ID: AAW510243
- Compatibility: 1970 Ford Mustang
- Wire Type: Modern GXL
- Included Components:
- ATC fuse panel
- Pre-built dash harness
- Engine and front light harness with extra-long leads
- Rear body wiring with extra-long leads
- 175 amp mega fuse kit with 6-gauge charge cable
- New headlight switch with 26 amp internal circuit breaker
- New floor dimmer switch
- Steering column adapter kit
- Headlight, fog light, and horn relays
- Column mounted ignition switch jumper
- Printed circuit board connector for stock gauges
- Original-replacement connectors, terminals, and lamp sockets
HOW TO USE:
- Preparation: Before starting, disconnect the battery and carefully remove the old wiring harness from the vehicle. Ensure that you have a clean and organized workspace.
- Mount the Fuse Panel: Install the new ATC fuse panel in the designated location on the firewall, following the provided instructions. This central location helps keep the wires organized and away from engine heat.
- Install the Dash Harness: Connect the pre-built dash harness to the fuse panel and begin routing the wires to the appropriate components, such as the ignition switch, light switch, and gauge cluster.
- Connect Other Harnesses: Route and connect the engine and front light harness to the fuse panel. Use the extra-long leads to customize the wire routing for your specific engine and accessory configuration. Repeat this process for the rear body wiring.
- Connect Accessories: Connect all your electrical accessories, including the new headlight switch, floor dimmer switch, and any aftermarket gauges or EFI systems, following the full-color schematics.
- Finalize and Test: Once all connections are made, double-check your work against the provided diagrams. Reconnect the battery and test all lights, gauges, and electrical components to ensure proper function before use.
BENEFITS OF USING THE AMERICAN AUTOWIRE 1970 FORD MUSTANG CLASSIC UPDATE KIT (AAW510243):
- Saves Time: The pre-built, labeled harnesses and comprehensive instructions significantly reduce the time and effort required for a full vehicle rewire compared to a custom, from-scratch job.
- Increased Reliability: Replaces decades-old wiring with new, modern GXL wire, reducing the risk of shorts, electrical failures, and fire hazards.
- Future-Proofing: The kit provides extra circuits and built-in support for a variety of future upgrades, making it an ideal long-term solution for a modified vehicle.
- Professional Results: Designed for a clean, professional-looking installation with all the necessary components and connectors in one package.
FEATURES:
- Pre-built dash harness with a unique gauge cluster disconnect system.
- Extra-long leads on engine, front, and rear body harnesses for custom routing.
- Six-way power accessory plug for easy connection of aftermarket items.
- Separate circuits and relays for headlights, fog lights, and the horn.
- A 175-amp mega fuse kit and 6-gauge charge cable to support high-output alternators.
- Headlight switch with an internal circuit breaker for added safety.
- Adapter kit provided for both stock and aftermarket steering columns.
- All new connectors, terminals, and lamp sockets included.






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