Method 1: Replacing the Head Unit (Easiest)
This is the cleanest and easiest method. Most modern aftermarket head units have high-level inputs, meaning they can accept the speaker-level signals directly from the car's wiring harness. This eliminates the need to deal with the factory amplifier entirely. You'll need a wiring harness adapter specific to your 1994 Mustang GT to connect the new head unit to the car's wiring.
Method 2: Bypassing the Amp with the Factory Head Unit (More Complex)
This is significantly more challenging and requires more technical knowledge. You'll need to:
1. Identify the Speaker Wire Outputs from the Factory Head Unit: This is the most difficult step. You'll need to trace the wires from the head unit to locate the speaker outputs. A wiring diagram for your specific year and model is crucial here. These diagrams are often available online through forums or repair manuals.
2. Locate the Speaker Inputs to the Amplifier: You'll need to trace the wires going *into* the amplifier from the head unit. These are usually low-level signals.
3. Disconnect the Amplifier: Disconnect the power and ground wires to the amplifier. This is important for safety.
4. Connect the Speaker Wires Directly: Once you've identified the wires, you'll need to connect the speaker outputs from the head unit directly to the speakers, bypassing the amplifier completely. This requires careful attention to polarity (+ and -). Connecting the wires incorrectly can damage your speakers. You'll likely need to use wire splices and crimp connectors.
5. Test: Carefully test the system to ensure the speakers work and there are no shorts or other issues.
Important Considerations:
* Sound Quality: Bypassing the amplifier will likely result in a reduction in sound quality compared to using the factory amplifier. The factory amp is designed to work with the factory speakers and head unit.
* Wiring Diagram: A wiring diagram is absolutely necessary for either method. Without one, you risk damaging your car's electrical system.
* Safety: Always disconnect the battery's negative terminal before working on your car's electrical system.
* Professional Help: If you're not comfortable working with car audio wiring, it's best to seek professional help. Improper wiring can cause damage to your car's electrical system or even create a fire hazard.
Replacing the head unit is the significantly simpler and safer option. Bypassing the amplifier while keeping the factory head unit is a complex task best left to someone experienced in car audio wiring.
