Question about Chevrolet Cars & Trucks
I also have a 2004 Trailblazer that had the low beam issue. I came on here and saw the suggestion to switch the #45 relay with #46, and it worked until just recently. So I went to NAPA autoparts and purchased a new relay. It worked at first, but then on the way home people pulled up next to me and said my break lights were out except for the top rear tail light. Does anyone have any ideas?
The brake lights can be the multi switch (turn signal wiper switch) or could be a ground wire issue if you're having problems with the headlights. Good luck.
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
SOURCE: Low Beam headlights not working
The daytime running lights run the high beam bulbs at low voltage so it sounds like you need to put the relays back where they were and either replace the low beam bulbs or repair the wiring to them.Also the relay you removed could be defective.
Posted on Dec 28, 2009
Try to see if the bulbs blew out by replacing the bulbs first. If they still won't light, it could be bad grounds or connections or bad continuity in the wiring to the headlight relays or switch. Good luck on this repair.
Posted on Dec 12, 2011
Other possibilities are; the bulbs themselves, burnt or corroded bulb sockets, or a bad headlight selector switch.
Posted on Dec 12, 2011
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