Volvo S40 HID Headlamps Installation

Written by daniel valladares
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Volvo S40 HID Headlamps Installation
HID headlights are more powerful than halogen headlights. (bmw dynamic hid xenon headlight image by Jorge Moro from

High-intensity discharge headlights, also known as xenon headlights, use xenon gas to produce a slightly bluish hue that makes the headlights up to three times brighter than traditional halogen headlights. This can be especially useful when driving in parts of the country where there are not many street lights. Installing HID headlights on your Volvo S40 is a lengthy, yet simple, process. When purchasing an HID installation kit, make sure that your kit comes with two ballasts and igniter assemblies, two HID bulbs with wire assemblies, two ballast-to-bulb connecting wires, and double-sided adhesive tape.

Skill level:

Things you need

  • HID installation kit
  • Drill
  • 1-inch boring drill bit
  • File
  • Electrical tape

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  1. 1

    Turn off the engine and open the bonnet. Remove the headlight holding pin from each headlamp assembly.

  2. 2

    Pull each headlight out and disconnect the power connection by pushing down on the tab and pulling straight out. Remove the headlights from the vehicle.

  3. 3

    Remove the back cover from the headlight assemblies by releasing the two metal retainers securing the cover.

  4. 4

    Drill a hole in the back of each cover with the drill and the 1-inch drill bit. Position the hole so that it is in the centre of the covers.

  1. 1

    Run the wires from the light bulb harness in through the hole in the cover. Set the rubber plug with wires into the cover and remove the halogen bulb by rotating it counterclockwise and pulling it straight out. Disconnect the bulb from the power connection and connect the power connection to the HID bulb. Place the HID bulb in the headlight assembly. Do not touch the glass portion of the new bulb.

  2. 2

    Wrap electrical tape around the bottom half of the power wires on the bulb harness. Place the power wires into the bulb connector. Connect the red wire to the yellow one and the black wire to the brown one.

  3. 3

    Wrap the bulb connector with electrical tape. Place the back cover back onto the headlight assembly.

  4. 4

    Connect the ballast-to-bulb harness to the bulb connector. Connect the first ballast connector into the harness, then connect the remaining two wires to the harness. Attach the two-sided tape onto the ballast.

  5. 5

    Run the ballast and wires through the headlight assembly and reconnect the power to the headlight. Place the headlight assembly back into the vehicle and reattach the retaining pin. Repeat with the other headlight.

Tips and warnings

  • Be careful working HID bulbs. As they are very high voltage, make sure the headlight is disconnected before working on the HID lighting system.

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