Although you replaced the alternator, it's possible that the replacement alternator you installed is defective or has issues.
2. Wiring Issues:
- Double-check the wiring you worked with during the alternator replacement and ensure that all connections are secure, free of corrosion, and the correct cables connect. Sometimes even minor issues like loose connections can cause similar symptoms or even trigger malfunctions in other electrical systems and warning lights.
3. Battery Issues:
If the battery is old, damaged, or has issues holding charge, it can cause fluctuating electrical conditions, leading to the brake and battery lights flickering. If you haven't already, have your battery tested to rule this out.
4. Computer Issues:
While less likely, a software glitch or issue within the vehicle's computer/ECU could also cause unusual electrical behaviors and possibly trigger multiple lights to come on. Disconnecting and reconnecting the battery sometimes resolves these types of issues.
5. Brake System Issues:
Although unrelated to the alternator or battery, if the brake system has low brake fluid or other related issues, it could cause the brake light to illuminate. Check your brake fluid and ensure your brakes are functioning normally.
