- Red: This wire supplies power to the ignition coil from the battery, usually through the ignition switch.
- Black or Brown: This wire is the primary ground connection for the ignition coil. It is usually connected to the engine block or cylinder head.
- Blue or Green: This wire sends the signal from the electronic control unit (ECU) to the ignition coil, telling it when to fire.
- Yellow: This wire represents high voltage and connects to the distributor or spark plugs.
However, it's important to note that color coding may vary depending on the specific model and year of your Fiat Uno, so it's always best to refer to the vehicle's service manual or consult with a professional mechanic for accurate wiring information.
