Citroen C4: Changing a bulb

In some weather conditions (e.g. low temperature or humidity), misting on the internal surface of the glass of the headlamps and rear lamps is normal, and will disappear after the lamps have been on for a few minutes.

Never look too closely at the light beam of LED technology lamps - risk of serious eye injury!

The headlamps have polycarbonate lenses with a protective coating:

- Do not clean them with a dry or abrasive cloth, nor with detergent or solvent products.

- Use a sponge and soapy water or a pH neutral product.

- When using a high-pressure washer on persistent marks, do not keep the lance directed towards the headlamps, lamps or their edges for too long, so as not to damage their protective coating and seals.

Changing a bulb must only be done with the ignition off and after the headlamp / lamp has been switched off for several minutes - risk of serious burns! Do not touch the bulb directly with your fingers; use a lint-free cloth.

It is essential only to use anti-ultraviolet (UV) type bulbs, so as not to damage the headlamp.

Always replace a failed bulb with a new bulb of the same type and specification. To avoid lighting imbalance, replace the bulbs in pairs.

Refitting the lamp units

Perform the operations in the reverse order to dismantling.

• Light-emitting diode (LED) headlamps and lamps
• Rear lamps

Light-emitting diode (LED) headlamps and lamps

Depending on version, the affected types of headlamps/lamps are:

• LED technology headlamps.
• Front foglamps.
• Daytime running lamps/sidelamps.
• Direction indicator side repeaters.
• Side spotlamps.
• Brake lamps.
• Third brake lamp.
• Rear sidelamps.
• Rear direction indicators
• Number plate lamps.

If you need to replace this type of bulb, you must contact a CITROËN dealer or a qualified workshop.

Do not touch the LED technology bulbs - risk of electrocution!

Front lamps

Model with LED headlamps

1. Daytime running lamps/Sidelamps
2. Dipped beam headlamps
3. Main beam headlamps
4. Direction indicators
5. Foglamps (P21W or LED)

Model with halogen headlamps

1. Daytime running lamps/Sidelamps (LED)
2. Main beam headlamps (H7)
3. Dipped beam headlamps (H7)
4. Direction indicators (PY21W)
5. Foglamps (P21W or LED)

Opening the bonnet/Accessing the bulbs

Proceed with caution when the engine is hot - risk of burns! Take care with objects or clothing that could be caught in the blades of the cooling fan - risk of strangulation!

Halogen bulbs (Hx)

To ensure good quality lighting, check that the bulb is correctly positioned in its housing.

Main/Dipped beam headlamps

► Remove the protective cover by pulling on the tab.

► Disconnect the bulb connector.

► Remove the bulb and replace it.

To refit, carry out these operations in reverse order, directing the bulb's positioning lug downwards.

Direction indicators

Rapid flashing of the indicator lamp for a direction indicator (left or right) indicates that one of the bulbs on the corresponding side has failed.

► Turn the connector a quarter turn anti-clockwise.

► Pull the bulb connector.

► Remove the bulb and replace it.

Amber-coloured bulbs must be replaced by bulbs with identical specifications and colour.

Foglamps (P21W)

For access, pass your hand under the bumper.

► Press the locking clip and disconnect the connector.

► Turn the bulb holder a quarter turn anti-clockwise.

► Remove the bulb holder.

► Remove the bulb and replace it.

Rear lamps

C4

1. Sidelamps (LED)
2. Brake lamps (P21W)
3. Reversing lamps (W16W)
4. Direction indicators (WY16W)

C4 X

1. Sidelamps (LED)
2. Brake lamps (LED)
3. Direction indicators (LED)
4. Foglamp (P21W) or Reversing lamp (W16W)

Changing bulbs

C4

The bulbs are changed from inside the boot.

► Open the boot.

► Remove the access flap on the corresponding side trim:

• Press each of the notches in the upper part of the flap to unclip it.
• Tilt the flap and its support then extract the assembly.

► Disconnect the lamp unit connector.

► Unlock the nut using a 10 mm pipe wrench then unscrew and remove it. Be careful not to drop it.

► Dismantle the lamp unit and carefully extract it, pulling it straight towards the outside.

► Unclip the bulb holder and remove it. Be careful not to disconnect the wiring harness.

► For the brake lamp, turn the bulb a quarter turn and replace it.

► For the reversing lamp and direction indicator, pull the bulb out and replace it.

Make sure to engage the lamp unit in its guides while keeping it in line with the vehicle.

Tighten sufficiently to ensure sealing, but without damaging the lamp unit.

Foglamp (P21W)

C4

For access, pass your hand under the bumper on the left-hand side.

► Turn the bulb holder a quarter turn to the left and pull it out.

► Turn the bulb a quarter turn to the left and pull it out.

► Replace the bulb.

Reversing lamp/Foglamp

C4 X

Theses bulbs are replaced from outside the rear bumper.

► Pass your hand under the bumper.

► Depending on version, remove the cover by turning it a quarter turn to the left.

► Turn the bulb holder a quarter turn to the right and pull it out.

► Turn the bulb a quarter turn to the left and pull it out.

► Replace the bulb.

When changing the bulb within a few minutes of switching off the ignition, take care not to touch the exhaust - risk of burns!

Fuses

Changing a fuse

All work must be carried out only by a CITROËN dealer or a qualified workshop.

The replacement of a fuse by a third party could cause a serious malfunction of the vehicle.

Installing electrical accessories

The vehicle's electrical system is designed to operate with standard or optional equipment.

Before fitting other electrical equipment or accessories to your vehicle, contact a CITROËN dealer or a qualified workshop.

CITROËN accepts no responsibility for the cost incurred in repairing the vehicle or for rectifying malfunctions resulting from the installation of accessories not supplied or not recommended by CITROËN and not installed in accordance with its recommendations, in particular when the combined power consumption of all of the additional equipment connected exceeds 10 milliamperes.