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<blockquote data-quote="CarAudio.com - Hal" data-source="post: 8891481" data-attributes="member: 682097">To help you with the wiring for the factory-installed premium radio in a 2003 Ford Expedition XLT, here&#039;s a general color-coded wiring diagram. However, always verify with a multimeter, as wire colors may vary somewhat depending on the specific vehicle and any aftermarket modifications.### Wire Color Codes for 2003 Ford Expedition XLT Radio1. **Power Wires**&nbsp;&nbsp; - **Yellow**: Battery + (Constant 12V)&nbsp;&nbsp; - **Red**: Ignition/Accessory + (Switched 12V)2. **Ground**&nbsp;&nbsp; - **Black**: Ground3. **Speakers**&nbsp;&nbsp; - **Front Left (+)**: Light Green/Black&nbsp;&nbsp; - **Front Left (-)**: Dark Green/Light Blue&nbsp;&nbsp; - **Front Right (+)**: Light Green/Yellow&nbsp;&nbsp; - **Front Right (-)**: Dark Green/Orange&nbsp;&nbsp; - **Rear Left (+)**: Light Brown/Black&nbsp;&nbsp; - **Rear Left (-)**: Dark Brown/Orange&nbsp;&nbsp; - **Rear Right (+)**: Light Brown/Yellow&nbsp;&nbsp; - **Rear Right (-)**: Dark Brown/Green4. **Amplifier Remote Turn-On**&nbsp;&nbsp; - **Blue/White**: Remote Turn-On (if applicable)5. **Data Wires (if needed for Premium Sound)**&nbsp;&nbsp; - Can vary based on the system, often related to the factory amplifier.### Tips for Installation- **Use a multimeter** to confirm the wiring functions.- **Secure connections** using quality connectors (soldering or heat shrink connectors recommended).- **Consult the vehicle’s service manual** for more details, especially if the system is complex (with factory amplifiers).### Additional ResourcesFor better clarity, you can often find wiring diagrams from resources like:- Online forums for car audio enthusiasts- Car radio installation guides specific to the Ford Expedition- Websites like Crutchfield, where they provide wiring diagrams based on specific vehicle modelsIf you still have difficulties, please consider reaching out to a professional installer or refer to a comprehensive repair manual for your vehicle.</blockquote>

[QUOTE="CarAudio.com - Hal, post: 8891481, member: 682097"] To help you with the wiring for the factory-installed premium radio in a 2003 Ford Expedition XLT, here's a general color-coded wiring diagram. However, always verify with a multimeter, as wire colors may vary somewhat depending on the specific vehicle and any aftermarket modifications. ### Wire Color Codes for 2003 Ford Expedition XLT Radio 1. **Power Wires** - **Yellow**: Battery + (Constant 12V) - **Red**: Ignition/Accessory + (Switched 12V) 2. **Ground** - **Black**: Ground 3. **Speakers** - **Front Left (+)**: Light Green/Black - **Front Left (-)**: Dark Green/Light Blue - **Front Right (+)**: Light Green/Yellow - **Front Right (-)**: Dark Green/Orange - **Rear Left (+)**: Light Brown/Black - **Rear Left (-)**: Dark Brown/Orange - **Rear Right (+)**: Light Brown/Yellow - **Rear Right (-)**: Dark Brown/Green 4. **Amplifier Remote Turn-On** - **Blue/White**: Remote Turn-On (if applicable) 5. **Data Wires (if needed for Premium Sound)** - Can vary based on the system, often related to the factory amplifier. ### Tips for Installation - **Use a multimeter** to confirm the wiring functions. - **Secure connections** using quality connectors (soldering or heat shrink connectors recommended). - **Consult the vehicle’s service manual** for more details, especially if the system is complex (with factory amplifiers). ### Additional Resources For better clarity, you can often find wiring diagrams from resources like: - Online forums for car audio enthusiasts - Car radio installation guides specific to the Ford Expedition - Websites like Crutchfield, where they provide wiring diagrams based on specific vehicle models If you still have difficulties, please consider reaching out to a professional installer or refer to a comprehensive repair manual for your vehicle. [/QUOTE]

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