-Faulty Wiring: Check the wiring harness that connects the brake light switch to the taillights. Ensure there are no loose connections, breaks, or corrosion in the wires.
-Brake Light Relay: If your vehicle is equipped with a brake light relay, it could be faulty and preventing power from reaching the brake lights. Check the relay and replace it if necessary.
-Faulty Brake Light Switch: Even though you mentioned replacing the brake light switch, it's possible the replacement is defective or improperly installed. Verify the switch is working correctly and is adjusted properly.
-Faulty Taillights: Check the taillights themselves to make sure they are not burnt out or have faulty connections. Replace any malfunctioning taillights.
-Fuse Issues: Inspect the fuse box and locate the fuse responsible for the brake lights. Check if the fuse is blown and replace it if necessary.
-Grounding Issues: Ensure the taillight bulbs have a proper ground connection. Clean any corrosion from the ground connection points.
-BCM (Body Control Module) Issues: In some cases, the Body Control Module (BCM) may be at fault. This is a common issue with the PT Cruiser. You may need to have the BCM diagnosed by a professional.
Troubleshooting and resolving the issue may require technical expertise and proper tools. If you're not comfortable working on your vehicle's electrical system, it may be best to consult a qualified mechanic or auto electrician.
