Question about 2004 Chevrolet TrailBlazer

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Both front low beam headlamps and both rear side brake lights out

Since both lowbeams and both rear brake lights went out at the same time, wouldn't that most likely mean a fuse has gone out? And if so, how do I know which fuses are out?

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Check under the hood in the fuse box pull the fuse and see if the wire in it is burned or broken if not then its good also if it good which im guessing it is. Im putting my money on the relay which is in the fuse box in the hood also and i will include a pic of the right relay to check i would swap the relays around and see if they turn on. Relays run aprx $35 heres a pic for you hope this helped you thanks

both front low beam headlamps and both rear side b - 30e4ed3.jpg

Posted on Apr 25, 2010

Testimonial: "Explanation makes sense. I will see if I can get tools to try the recommendation. Thanks for the quick response."

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  1. Open and support the hood.
  2. Remove the grille.
  3. Pull up on the retaining tabs in order to remove the headlamp assembly from the headlamp panel.
  4. Disconnect the headlamp leveling electrical connector from the motor/actuator if equipped.
  5. Disconnect the headlamp electrical connector from the headlamp assembly.
  6. Remove the side marker socket from the headlamp assembly.
  7. Remove the park/turn socket from the headlamp assembly.
  8. Remove the headlamp assembly from the headlamp panel.
  9. Remove the access cover from the rear of the headlamp.
  10. Disconnect the electrical connector from the socket.
  11. Rotate the bulb and socket counter clockwise in order to remove the bulb and socket from the housing.
  12. Disconnect the electrical connector from the socket.
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