2002 Acura tl replaced driver side hid bulb but still does not work. Prob started after very minor side swipe accident headlight assembly was damaged and is cracked on the seem. both turn signal bulbs were damaged. the high beam still works. I replaced the HID and both turn signal bulbs and they work fine

Nick, To see how headlight bulb is changed, check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Replacement How to replace install fix change hid head light ballast...
Headlight Change 1999 2003 Acura TL 1999 Acura TL 3 2L V6
Acura TL Headlight Replacement WITHOUT removing the bumper

TL take a D2S type HID bulb available online. If the ballast unit is bad you can find them on ebay a lot cheaper. It's located on the bottom of the headlight. I've even seen full headlight units with the bulb and ballast unit included for a couple hundred on ebay. That would be the easier way to go if you aren't handy with car work. To replace the bulb you need to pull the whole headlight out because Acura uses a security type bolt to secure the back cup onto the headlight. Once the headlight is off the car it's easy to remove the security bolt though with needle nose plyers

Mine done the same thing and mine was the ballast.I tried the bulbs first as you did and didnt work .I found the ballast and the igniter at a great price together on ebay and replaced both and they work great now!!

Be sure to check the ground side conn.

I having a same problem as you.
I have changed Head light (general head light 12V 37W)
I plug out inverter connector and connect 12V 37W bulb directly
It works fine.

HID Bulb Removal

WARNING: A transient high tension (25,000 V) occurs at the bulb sockets of the high intensity discharge (HID) lamps when the combination light switch is turned ON. It may cause serious electrical shock or electrocution if you do not observe the cautions below .

CAUTION:

• Never turn on the combination light switch before fitting the HID bulbs to their bulb sockets and completing the reassembly of the headlight assembly.
• Do not service the headlights assembly in wet conditions, such as rain or snow, near a sprinkler system, or when your hands are wet to prevent electrocution.
• Do not touch the surface of the HID bulbs with your bare hands and do not stain it with any oils and fats.
• Do not disassemble the inverter unit and the ignitor unit.
• Do not turn on the HID bulb by using a power source other than the battery mounted on your vehicle.

1. Make sure you have the anti-theft code for the radio and the navigation system, then write down the frequencies for the radio's preset buttons.
2. Combination light switch OFF.
3. Disconnect the battery negative cable, then disconnect the positive cable.
4. Disconnect the headlight assembly 2P connector.
   1. Remove the Torx bolt (A) using a Torx T20 bit.
   2. Turn the cover (B) 45 ° counterclockwise to remove it from the headlight assembly.Turn the socket (A) 45 ° counterclockwise to remove it from the bulb (B).
      1. Pull the retaining spring (A) away from the bulb (B), then remove the bulb (B).
      2. Install the new bulb in the reverse order of removal.
      3. After reconnecting the battery, enter the anti-theft code for the radio and the navigation system, then enter the customer's radio station presets.

heres the procedure I uploaded it for you click [b][i]HERE[/i][/b]

If you do not have a sealed beam assembly, then remove the four screws on top...when the headlight assembly comes out unclip the harness from the bulb assembly. Pull the bulb out and replace...don't touch the halogen bulb with your fingers...just the plastic base.

HID Bulb Replacement

A transient high tension (25,000 V ) occurs at the bulb sockets of the high intensity discharge (HID) lamps when the combination light switch is turned ON, it may cause serious electrical shock or electrocution if you do not observe the cautions below.

CAUTION:

• Never turn on the combination light switch before fitting the HID bulbs to their bulb sockets and completing the reassembly of the headlight assembly.
• Do not service the headlights assembly in wet conditions, such as rain or snow, near a sprinkler system, or when your hands are wet to prevent electrocution.
• Do not touch the surface of the HID bulbs with your bare hands and do not stain it with any oils and fats.
• Do not disassemble the inverter unit and the ignitor unit.
• Do not turn on the HID bulb by using a power source other than the battery mounted on your vehicle.

1. Make sure you have the anti-theft codes for the radio and the navigation system, then write down the XM radio channel preset. Make sure the ignition switch is OFF.
2. Turn the combination light switch OFF.
3. Disconnect the battery negative cable, then disconnect the positive cable.
4. Remove the headlight assembly.

1. Remove the Torx bolt using a Torx T20 bit.
2. Turn the cover (A) 45 ° counterclockwise to remove it from the headlight assembly.

1. Turn the socket (A) 45 ° counterclockwise to remove it from the bulb (B).
2. Pull the retaining spring (C) away from the bulb then remove the bulb.
3. Make sure the bulb harness (D) is routed correctly so it does not contact the reflector (E).
4. Install the new bulb in the reverse order of removal. Make sure the notches in the bulb align with the tabs in the headlight.
5. After reconnecting the battery, enter the anti-theft codes for the radio and the navigation system, then enter the customer's XM radio channel presets.

disconnected the HID ignighter. used a T20 to remove bulb cover. pulled out bulb and installed new bulb. DO NOT TOUCH THE BULB WITH BARE HANDS!!!