Installing an after-market head unit in a 2003 Ford Focus Click to view on Bing6:34Here's how I installed an after-market Kenwood 1 DIN head unit into my 2003 Ford Focus. Installing an after-market head unit in a 2003 Factory wiring harness: Ford ISO WIRING HARNESSAuthor: CforCraigViews: 53K Ford Focus Wiring Diagrams 1999 to 2016 [Complete] - YouTube Click to view on Bing6:20This video demonstrates the Ford Focus Complete Wiring Diagrams and details of the wiring harness. Diagrams for the following systems are included : Radio Wiring, Engine Wiring, AC wiring, ABSAuthor: John AmahleViews: 4 Car Stereo Radio Wiring Diagram - 2003 Ford Focus Whether your an expert installer or a novice enthusiast with a 2003 Ford Focus, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2003 Ford Focus. Wiring Problems of Ford Focus - part 1 - carproblemzoo Wiring; Wiring Problems of Ford Focus but Ford has a recall on the st model with 2. 0l engine for the same failure mode and cause (wiring harness). Ford did "participate" in the repair See all problems of the 2003 Ford Focus . Wiring problem of the 2013 Ford Focus 15. 2003 Ford Focus | Stereo Wiring Diagram 2003 Ford Focus Stereo Wiring Information. Radio Constant 12V+ Wire: Orange/Black (Thick Wire) One Response to “2003 Ford Focus Left side of the drivers foot well is a wiring harness going vertically by the foot well light. inside of that harness is a Brown wire Ford Focus Wiring Harness | Auto Parts Warehouse Let the people with 12+ years of experience in finding and buying car parts help you find the best Wiring Harness for your Ford Focus. We here at Auto Parts Warehouse want to make sure you're happy with your car part purchases.