Get the trouble code and post it here so we can understand what is causing it.
The headlight should be a separate problem, unless the trouble code is triggered by something that shares the same ground ciruit connection as the left headlight and that connection is bad.
Are both high and low beams out for the headlight?
Attached is a schematics for the headlight. Get a test lamp or DVOM to test the presence of power supply to the headlght when light switchis turned on.
Ensure the ground circuit connection for the left headlight is clean and secure.
Monday, May 2nd, 2011 AT 1:29 AM