why does my Ford Mustang S550 (2015-2023) dashboard lights flicker

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface, and the ignition is off.
• Disconnect the battery to prevent electrical shock.

2. Inspect Battery and Alternator

• Battery Inspection:
  • Clean battery terminals using a wire brush to remove corrosion.
  • Tighten connections to ensure a secure fit.
• Alternator Testing:
  • Reconnect the battery.
  • Start the engine and use a multimeter to test the alternator output.
  • If the voltage is outside the range of 13.5-14.5 volts, consider replacing the alternator.

3. Check Fuses

• Locate the fuse box and remove the cover.
• Use a fuse puller or pliers to carefully remove the fuses related to the dashboard and lighting.
• Inspect each fuse for continuity; replace any blown fuses with one of the same rating.

4. Inspect Wiring

• Visually inspect the wiring harness connected to the dashboard for any damage.
• Repair or replace any damaged wires or connectors as necessary.

5. Instrument Cluster Reset

• With the vehicle still off, reconnect the battery.
• Turn on the ignition without starting the engine and allow the dashboard lights to cycle.
• Check if the flickering persists; if so, consider replacing the instrument cluster.