2. Faulty light switch: The light switch that controls the side lights and dashboard may be faulty. Try turning the light switch on and off several times to see if the side lights and dashboard come on. If they do, the light switch may need to be replaced.
3. Electrical wiring issue: There may be a break in the electrical wiring that supplies power to the side lights and dashboard. This could be due to wear and tear, damage, or corrosion. Check the wiring for any damage or loose connections and repair or replace as necessary.
4. Faulty bulbs: The side light bulbs or dashboard bulbs could be faulty and need to be replaced. Check the bulbs and replace any that are burnt out or damaged.
5. Faulty light control module: Some Ford Fiesta models have a light control module that manages the electrical system for the lights. If the light control module is faulty, it could cause the side lights and dashboard to not work. Diagnosing and repairing a faulty light control module may require professional assistance.
6. Battery issues: If the car battery is weak or has low voltage, it may not provide sufficient power to the side lights and dashboard. Check the battery health and connections, and replace or recharge the battery if necessary.
7. Faulty relays: Relays are electrical switches that control the flow of power to various components. A faulty relay related to the side lights or dashboard could prevent them from working. Check and test the relays and replace any that are faulty.
If you are unsure of the cause of the problem or are not comfortable performing electrical repairs, it is best to consult a certified mechanic or auto electrician for proper diagnosis and repair.