so lately my gauge cluster my tail lights and parking lights all have this crazy pulse to them while the car is running. Checked all grounds checked the alternator output while car was running at the battery and got 14. something and battery with car off is 12.6 so all seems well. Havent changed out the alternator yet cause it seemed to be working ok. What would make the lights pulse like crazy? anything i have over looked? thought about taking it to autozone and have them test the alternator. Its quite annoying though so any help would be great

 

What year Civic?

You may have a faulty combination switch on the steering column.

Also check for a loose fuse (#19?).

 

2000 civic and what is that cause i have never heard of that

 

See diagram below.