This morning, the Service light came on in my 2004 Chev Cavalier. I later discovered that the daytime running lights are no longer working. However, if I turn on the headlight switch both headlights are working on high and low beams. Therefore, assuming it was not the headlight bulbs I changed the DRL relay in the fuse panel but it didn't solve the problem. Still no DRL.
Can anybody suggest the probable reason why my daytime running lights are not working? Thanks.