Expert: Sean Halliday - 4/17/2007

Question
Sean, my 1993 nissan maxima has high beam lights that dim from time to time when i use them.  I have had the headlights, battery, and alternator replaced. What is wrong?

Answer
Another wiring problem from Nissan.This is a intermittent problem which needs to be seen by a good electrician.It sounds like you have a big voltage drop on high beam but as to where and why i would be guessing.My first idea was the alternator but you have changed that so it sounds still like the regulator or may be the relay for main beam.You did use the correct bulbs i assume?Most cars use different ampage/watts for head lights.