( continue from my post here:
No low beams. High beams only. - Page 5 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum )
The lights on my Mom's 2004 Envoy are going crazy! They do something different every time, but usually it's the DRL/Low beam not working problem.
I have switched the 45 and 46 relay (both have a 15016745 part number on them) as suggested but with no luck. I have also put 4 new 10 amp fuses in for the low and high beam circuits and a 15 amp for the HDM.
Sometimes both lights will work and sometimes only one and it will switch from left to right and/or high to low each time for what will and will not work. Mostly it is just the right high beam but an occasional bump will make the left high beam work for a few minutes.
What else can I try, could it be the switch behind the knob on the dash? What about the AHS (Automatic Headlamp System), could it be the sensor on the dash for that?
I assume the lights on the top are the high beam and the ones on the bottom are low beam, correct?
Crazy lights driving me crazy