Question about 2004 Chevrolet TrailBlazer

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WHERE IS THE FUSE BOX LOCATED AT I CANT FIND IT CAUSE THE LOW LIGHT BEAMS DONT WORK

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  • mountjoychic Mar 02, 2009

    I just had the same problem of my headlights not working. my high beams did but not low. if you have not found a solution yet try getting under the hood to the fuse box and switch #45 relay (cooling Fan) with #46 relay (hdm) it just worked for us.

  • olblueduke May 11, 2010

    do the high beams work?? if so it could be a switch problem...alot of times the headlamp relay or fuse is located under the hood due to the fact the lights are a high amp draw item

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In the engine compartment labled FUSES AND RELAYS.

Posted on Feb 21, 2009

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Low beams dont work 98 merc milan


This is not a fuse problem, the headlights are not fused, check the dimmer switch for power out to the head lights.

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High beam works and low beam dont , checked fuses under hood there good , tried new switch stilll no low beam , is there a relay for low beam cant find one.


Why yes there is. It's #46 under the hood. Switch relay #45 with #46, do you now have lights? Either clean the contacts by pushing it in and out of the fuse box, or buy a new relay. Cleaning the relay worked for me, but I keep a spare just in case. Very common problem with Envoys and Trailblazers.

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Both your low beam and your high beam is protected by the same fuse, so it makes sense that the fuse is OK if the high beam is working on the passenger side. There are 3 fuses for the headlamps. Fuse #13 in the Battery Junction Box (20 Amp). If this fuse is blown, the headlamp relay will not have any power and neither high nor low beam on either side will work (you will have no headlamps at all) Then there is Fuses #2 and #3 (15 Amp) in the Battery Junction Box. #2 goes to the left low and high beam and #3 goes to the right low and high beam.
The headlamp switch uses a SINGLE CIRCUIT to control BOTH sides at the same time, so if one side works, the switch cannot be the problem. The headlamp relay provides power for fuses #2 and #3 and we already ascertained that these fuses must have power since we have working lights on both sides, so the relay cannot be the problem. A replacement bulb has already been tried, so that pretty much leaves us with a bad lamp socket. (Most likely cause) or a bad connection at splice #S122, which is located in the main wiring harness near the breakout for the left headlamp. (RED/BLACK wire)

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check relays and fuses located with owners manual if you dont have
look in fuse box may be under hood not familiar with astro vans

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My low beam headlights do not work as daytime running lights or manually with the headlight knob pulled out . The high beam headlights however do work if I have the knob pulled out all the way with the...


Check out your fuse associate with the low beam headlight, secondly there is a relay fuse under fuse rely box under the hoos. Locate this box, and locate the relay fuse associated to the low beam. You can rotate the relay with another relay of the same spec to see if the low beam lights are coming on. I would believe that it is a fuse that is blown, check your owners manaual on the location of the fuse box. Usually it's located in the driver side kick panel.

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Relay box location. there is a problem with the drivers and pasangers window wont go up or down and the head lights dont work but the side lights will. therefore i think its the hrad lights


Fuse for window regulator (circuit breaker) on 13 position auxiliary relay panel. The wiring connectors are located at the lower left and right side kick panels. The auxiliary relay panel is located above the lower kick panel above the pedals.

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#18 High beam right 10A
#19 High beam left 10A
#20 Low beam right 15A
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Daytime running light relay location on upper (auxiliary) relay panel. This are the only ones using relays regarding your question.

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do your flash to pass lamps light when you pull the stalk towards you? If yes, the bulbs are ok.
Do the hig beams work?
Your headlamps have sepaerate fuses for each headlamp and you have a low beam relay and a high beam relay under the hood in the black box.
If everything is out, I suspect a bad headlamp switch.
Check car-part.com and look on page with * for cheapest price.

Your owner manual will identify fuses & relays.

PS, You did not recently instal high current bulbs did you? If yes, put originals back in.

HEADLAMPS

The voltage is supplied to the lamp switch through a fuse. This fuse is located in the central junction box in the left-hand footwell.
When the headlamps are switched on, a voltage is supplied to the high beam/low beam switch and to the low beam relay. The relay for the low beam is located in the battery junction box (BJB) in the engine compartment.
If the high beam/low beam switch is set to "low beam", then a voltage is supplied through the low beam relay to the low beam part of the headlamp assembly. The left and right-hand low beams are fused separately. The fuses are located in the battery junction box (BJB) in the engine compartment.
If the high beam/low beam switch is set to "high beam", then a voltage is supplied through the high beam relay to the high beam part of the headlamp assembly. The left and right-hand high beams are fused separately. The fuses are located in the battery junction box (BJB) in the engine compartment.

----------------------------------------------------------------------------------------------------------
Lamp Switch
Removal
  1. s2y~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Disconnect the battery ground cable. For additional information, refer to Section 414-01 .
    Remove the lower driver's side footwell trim.
  1. Detach the lamp switch bezel.
    • Remove two screws.
  1. Remove the light switch.
    • Remove three screws.
    • Disconnect the electrical connector

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