Shortage 2006 impala headlights

Here is the firing order and spark plug wire routing diagram for a 2006 Chevy Impala LT 3.9 V6:
Firing order: 1-2-3-4-5-6
Spark plug wire routing (starting from the driver's side):

• Cylinder 1: connect to the coil tower closest to the driver's side headlight
• Cylinder 3: connect to the coil tower next to cylinder 1
• Cylinder 5: connect to the coil tower next to cylinder 3
• Cylinder 2: connect to the coil tower closest to the passenger side headlight
• Cylinder 4: connect to the coil tower next to cylinder 2
• Cylinder 6: connect to the coil tower next to cylinder 4

Note: Make sure to route the wires properly to avoid cross-firing.

Headlight relay is under hood in fusebox

You can fix it yourself you just need to find out where the shortage is. If its up close to the bulb then its not a big deal to change. Just go to an auto parts store and get a new headlight pigtail for it then splice it in. If its further up the harness it can be a little bit more difficult.

check for a loose connection on the back of the bulb, wire in the connector for the bulb or a bad ground connection/ wire
all you can do with a visual inspection

GM does not use a headlight relay, the switch contains a safety cut off switch to avoid short induced fires. You likely have a defective main light switch and the connector to it is also burnt.

New for 2006 Chevrolet Impala The 2006 Chevrolet Impala receives a 211-horsepower 3.5-liter V6 for the LS and LT trims, with a 242-horsepower V6 standard for the LTZ and optional for the LT. The Impala SS is powered by a 303-horsepower 5.3-liter small-block V8 with Displacement on Demand technology. Updated exterior styling includes new front and rear fascias, headlights, and taillights. Inside the 2006 Impala features flip-and-fold rear seats, new instrument panel that wraps into the door panels, and standard side-curtain airbags

How to change the headlight bulb:
1: Near the headlamp assembly where the amber turn signal bulb is a white plastic tab. Pull it up about 2 inches. Do not be alarmed if it comes out completely.
2: On the opposite side is a bolt (9/32 inches or 7mm). Remove the bolt. Do not lose it!
3: Pull out the headlamp assembly and change you bulb!
4: Put the assembly back in place, install the bolt and slide the plastic tab back in place over the gray squares to secure the whole schee-bang. Done!

that would be a shortage in the wiring or your fuse is about to go out check that first its the easiest fix if that dont work follow the wiring harness till you find the shortage

Is the bulb connector melted? Its the plastic piece that the bulb plugs into. You can get a new one from your Mazda dealer for about $20. I've seen quite a few bulb connectors go bad and short out the bulbs. Especially when people run mp3 players and phone chargers all the time.

did you take a look at your back lights too? cause if the interior lights are not working when headlights are on, then your rear lights will not work, only the brake lights will. Chances are you have a shortage, check your 10 am fuse for tailight and make sure it's not blown. if you put another one in and it still blows, then you have to find out where your are getting a shortage. chances are it's your side marker lights where your front bumper is, so check that first, i had a similar problem.