Low beam head lights
SOURCE: 2006 GMC Envoy low beam
Hello, try to start by checking the headlight relay and headlight fuse. You
also may want to check to make sure the bulbs aren't blown out. If those
parts check out to be fine and in working order, you may need to
replace the turn signal assembly in the steering column. This part
controls the hi/low beams. This may sound crazy but, when GM wired
their older trucks, they wired the headlights to go from the battery,
to the hi/low beam switch, then to the headlight switch (to the left of
the steering wheel) then out to the light bulbs. You can kind of test
to see if this part is good by making a fist and (with your headlights
on) gently hitting the plastic cover for your steering column that is
right behind your actual steering wheel. This could cause your
headlights to flicker on and off.
Thanks
SOURCE: 2003 gmc Envoy Low Beam Headlights both quit at
Relay in fuse box under hood on driver side wheel well labeled HDM, #46 on 2004 Envoy XUV. Swap with relay #45 labeled "Fan" to test. That was my problem.
Good Luck,
Sam
SOURCE: the auto headlights on my
Relay #46 in the underhood fuse panel is probably bad. You can verify this by swapping it with relay #45. Also, sometimes the relay contacts become corroded, check these when you have the relay out.
SOURCE: Checked fuses , relay, dimmer switch in my 2004
How did you check the relay? Have you tried switching relay #45 with relay #46?
HEADLIGHTS NOT WORKING
It
can be faulty headlight switch or issue with its wiring. Or its faulty head
light fuse.
==========
To
troubleshoot the issue i suggest you few help links with appropriate solution.
So you can follow the test and confirm what exact problem is there in your case
of headlights not working:-----
Click
the link below: -----
http://repairhelpcenter.blogspot.com/2012/01/all-headlights-not-working.html
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• Working of Headlight switch?
------------
• Both headlight bulbs blow together?
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• Car
headlight bulbs don't last long?
---------------
http://technoanswers.blogspot.in/2012/06/2007-dodge-caliber-low-beam-headlight.html
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----------
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http://technoanswers.blogspot.in/2012/04/2001-chevrolet-tahoe-both-low-beam.html
------------
http://schematicsdiagram.blogspot.in/2012/04/low-beam-headlights-modification.html
---------
How to Replace a Headlight
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight.html
------------
How to Replace a Headlight
Bulb
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-headlight-bulb.html
-----------
How to Replace a Headlight
Switch
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-headlight-switch.html
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How to Replace a Headlight Assembly
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight-assembly.html
How to Replace a Park Light Assembly
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-park-light-assembly.html
-----------
http://schematicsdiagram.blogspot.in/2012/04/low-beam-headlights-modification.html
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http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-headlight-door.html
----------
http://schematicsdiagram.blogspot.com/2012/01/how-to-replace-hid-headlight-bulbs-for.html
----------------
These
will help.
Thanks.
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