Get In the event of a breakdown -> 12 V battery/Accessory batteries Guide for Peugeot 408 4 Door Second Generation (2022-2026)

In the event of a breakdown

Model with Full LED 3D lamps

► For the reversing lamp: pull out the bulb and

replace it.

PEUGEOT accepts no responsibility

10

for the cost incurred in repairing the

vehicle or for rectifying malfunctions resulting

from the installation of accessories not

supplied or not recommended by PEUGEOT

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.

Refitting the lamp units

Perform the operations in the reverse

order to dismantling.

When changing the bulb within a few

minutes of switching off the ignition, take

care not to touch the exhaust - risk of burns!

12 V battery/Accessory

batteries

Fuses

1. Direction indicators (LED)

2. Brake lamps/sidelamps (LED)

3. Sidelamps (LED)

4. Foglamps (P21W)

5. Reversing lamps (W16W)

Changing a fuse

All work must be carried out only

by a PEUGEOT dealer or a qualified

workshop.The replacement of a fuse by a

third party could cause a serious malfunction

of the vehicle.

Lead-acid starter batteries

These batteries contain harmful

substances (sulphuric acid and lead).

They must be disposed of in accordance

with regulations and must never under any

circumstances be discarded with household

waste.

Reversing lamps/Foglamps

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

PEUGEOT dealer or a qualified workshop.

Dispose of used batteries at a designated

collection point.

Protect your eyes and face before

handling the battery.

All operations on the battery must be carried

out in a well ventilated area and away from

naked flames and sources of sparks, to avoid

any risk of explosion or fire.

These bulbs are replaced from outside the rear

bumper.

► Remove the fixing screw(s) from the access

flap located under the bumper using a Torx

screwdriver or 10 mm hexagonal socket.

Wash your hands afterwards.

► Unclip the access flap.

► Turn the bulb holder a quarter turn and

remove it.

► For the foglamp: turn the bulb a quarter turn

and replace it.

185

In the event of a breakdown

Accessing the battery

Electronic control units/LED

technology headlamps

Precautions before working on the

accessory battery

The battery is located under the bonnet.

Never connect the negative jump lead to the

metal part of the electronic control units or at

the back of the headlamps.

Select mode P, switch off the ignition, check

that the instrument panel is off and that the

vehicle is not being charged.

Risk of destroying the electronic control units

and/or headlamps!

Connect to the remote earth point provided

for this purpose.

Jump-starting another vehicle

Do not use the accessory battery to jump-

start another vehicle or to charge another

vehicle's battery.

If the battery fails(after warranty

coverage), replace it with a battery of the

same specification as the one used in the

vehicle.

All battery information can be found online at

Symbols

For access to the (+) terminal:

No sparks or naked flames, no

smoking.

► Release the bonnet by pulling the internal

release lever, then the external safety catch.

► Raise the bonnet.

Always protect your eyes. Explosive

gases can cause blindness and injury.

(+) Positive terminal with a quick-release

terminal.

Frozen battery

(-) Negative terminal.

Never try to charge a frozen battery - risk

of explosion! If the battery has frozen, have

it checked by a PEUGEOT dealer or by a

qualified workshop, who will verify that the

internal components have not been damaged

and that the case has not cracked, which

could lead to a risk of leakage of toxic and

corrosive acid.

Keep the vehicle's battery out of the

reach of children.

As the battery's negative terminal is not

accessible, a remote earth point is located

opposite the battery.

Starting using another battery

The vehicle's battery contains

sulphuric acid which can make you go

blind or cause severe burns.

If the vehicle's battery is flat, the engine can be

started using a backup battery (either external or

from another vehicle) and jump leads or using a

battery booster.

For more information, refer to the

handbook.

Automatic gearbox

Never try to start the engine by pushing

the vehicle.

Explosive gases can be present close

to the battery.

Electric vehicles

For petrol versions

Flat accessory battery

It is no longer possible to start the motor or

recharge the traction battery.

Procedure for starting the engine using another

battery or for charging a discharged battery.

186

In the event of a breakdown

► Connect the other end of the green or black

Never start the engine by connecting a

battery charger.

To charge the vehicle's battery yourself,

use only a charger compatible with lead-

acid batteries with a nominal voltage of 12 V.

cable to the earth point C.

10

► Start the engine on the assisting vehicle and

leave it running for a few minutes.

Never use a 24 V or higher battery booster.

Check beforehand that the backup battery

has a nominal voltage of 12 V and a capacity

at least equal to that of the discharged

battery.

► Operate the starter on the broken down

vehicle and let the engine run.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

If the engine does not start immediately,

switch off the ignition and wait a few

moments before trying again.

The two vehicles must not be in contact with

each other.

Switch off all electricity-consuming equipment

on both vehicles (audio system, wipers,

lighting, etc.).

Make sure that the jump leads are well away

from the engine’s moving parts (fan, belt,

etc.).

It is not necessary to disconnect the

battery.

► Wait for it to return to idle.

► Disconnect the jump leads in reverse order.

► Refit the plastic cover to the (+) terminal, if

the vehicle has one.

► Switch the ignition off.

► Switch off all electrical consumers (audio

system, lighting, wipers, etc.).

► Allow the engine to run for at least 30

minutes, with the vehicle stationary, so that

the battery reaches an adequate state of

charge.

Do not disconnect the (+) terminal while the

engine is running.

Driving immediately without having

reached a sufficient level of charge may

affect some of the vehicle's functions (e.g.

Stop & Start).

Charging the battery using a battery

charger

► Switch off charger B before connecting the

cables to the battery, so as to avoid any

dangerous sparks.

For optimum service life of the battery, it is

essential to maintain an adequate state of

charge.

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

► Ensure that the charger cables are in good

condition.

In some circumstances, it may be necessary to

charge the battery:

– When using the vehicle mainly for short

journeys.

– If the vehicle is to be taken off the road for

several weeks.

Consult a PEUGEOT dealer or a qualified

workshop.

► Connect the red cable to the (+) terminal of

flat battery A (at the metal elbow), then to the

(+) terminal of the backup battery B or of the

booster.

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

► Connect the cables of charger B as follows:

► Connect one end of the green or black cable

to the (-) terminal of the backup battery B or

of the booster (or to an earth point on the

assisting vehicle).

• the positive (+) red cable to the (+) terminal of

battery A.

• the negative (-) black cable to earth point C on

the vehicle.

187

In the event of a breakdown

► At the end of the charging operation, switch

off charger B before disconnecting the cables

from battery A.

Quick-release terminal clamp

Disconnecting the (+) terminal

Do not force the lever when pressing on it,

as if the clamp is not positioned correctly,

locking will then not be possible.

Start the procedure again.

If this label is present, use only a 12

V charger to avoid causing irreversible

damage to the electrical components.

The Stop & Start system may not be

operational during the trip following the

first engine start.

24V

In this case, the system will only be available

again after a continuous period with the

vehicle immobilised, the duration of which

depends on the exterior temperature and the

state of charge of the battery (up to about 8

hours).

12V

Disconnecting/Reconnecting the 12 V

battery

► Depending on equipment, lift the plastic

cover on the (+) terminal.

In order to maintain an adequate state of

charge for starting the engine, we recommend

disconnecting the battery if the vehicle is to be

unused for an extended period.

► Raise lever A fully to release clamp B.

► Remove clamp B by lifting it off.

For hybrid versions

Procedure for starting the engine using another

battery or for charging a discharged battery (12

V or 48 V).

Reconnecting the (+) terminal

Before disconnecting the 12 V battery:

► Access to the 12 V battery.

► Close all openings (doors, boot, windows,

roof).

For more information on Accessing the battery,

► Switch off all electricity-consuming devices

(audio system, wipers, lamps, etc.).

refer to the corresponding section.

► If necessary, perform the 12 V battery

disconnection/reconnection procedure.

► Switch off the ignition and wait for 4 minutes.

After accessing the 12 V battery, it is only

necessary to disconnect the (+) terminal.

For more information on Disconnecting/

Reconnecting the battery, refer to the

corresponding section.

► After reconnecting the 12 V battery, perform

the automatic reset procedures of the

electronic systems and manual reset of some

equipment.

► Raise lever A fully.

► Refit open clamp B on the (+) terminal.

► Push clamp B fully down.

► Lower lever A to lock clamp B.

► Depending on equipment, lower the plastic

cover on the (+) terminal.

For more information on Following

reconnection, refer to the corresponding

section.

188

In the event of a breakdown

Starting using another battery

With hybrid vehicles

Driving immediately without having

10

reached a sufficient level of charge may

affect some of the vehicle's functions (e.g. e-

Auto mode).

The hybrid system starts the vehicle, but a

12 V supply is required. There are several

reasons why the vehicle cannot be started.

Charging the 12 V battery using a battery

charger

For optimum service life of the battery, it is

essential to maintain an adequate state of

charge.

In some circumstances, it may be necessary to

charge the battery (e.g. if the vehicle is to be

taken off the road for several weeks) Consult a

PEUGEOT dealer or a qualified workshop.

If the 12 V battery is flat, the 12 V power supply

can be ensured using a backup battery (either

external or from another vehicle) and jump leads

or using a battery booster or using a battery

charger.

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

► Connect the red cable to the (+) terminal of

flat battery A (at the metal elbow), then to the

(+) terminal of the backup battery B or of the

booster.

Never use a 24 V or higher battery

booster.

Check beforehand that the backup battery

has a nominal voltage of 12 V and a capacity

at least equal to that of the discharged

battery.

The two vehicles must not be in contact with

each other.

Switch off all electricity-consuming equipment

on both vehicles (audio system, wipers,

lighting, etc.).

Make sure that the jump leads are well away

from the engine’s moving parts (fan, belt,

etc.).

Do not disconnect the (+) terminal while the

engine is running.

The hybrid system is connected to

the 12 V network through the DC/DC

converter. Any operation may affect the

overall behaviour of the system.

To charge the vehicle's battery yourself, use

only a charger compatible with lead-acid

batteries with a nominal voltage of 12 V.

► Connect one end of the green or black cable

to the (-) terminal of the backup battery B or

of the booster (or to an earth point on the

assisting vehicle).

► Connect the other end of the green or black

cable to the earth point C.

► Start the engine on the assisting vehicle and

leave it running for a few minutes.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

► Operate the starter on the broken down

vehicle and let the engine run.

If the engine does not start immediately, switch

off the ignition and wait a few moments before

trying again.

It is not necessary to disconnect the

battery.

► Wait for it to return to idle.

► Disconnect the jump leads in reverse order.

► Refit the plastic cover to the (+) terminal, if

the vehicle has one.

► Switch the ignition off.

► Switch off all electrical consumers (audio

system, lighting, wipers, etc.).

► Allow the engine to run for at least 20

minutes, with the vehicle stationary, so that

the battery reaches an adequate state of

charge.

189

In the event of a breakdown

Do not try to charge the hybrid system

directly.

The hybrid system is connected to the 12 V

network through the DC/DC converter. Any

operation may affect the overall behaviour of

the system.

Only use a specific 12 V battery charger

capable of maintaining 13.5 V with a high

level of current 40-50 A (approx. 600 W).

To charge the vehicle's battery yourself, use

only a charger compatible with lead-acid

batteries with a nominal voltage of 12 V.

Never use a 24 V or higher battery booster.

► Switch off charger B before connecting the

cables to the battery, so as to avoid any

dangerous sparks.

► Switch off charger B before connecting the

cables to the 12 V battery, so as to avoid any

dangerous sparks.

► Ensure that the charger cables are in good

condition.

► Ensure that the charger cables are in good

condition.

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

► Connect the cables of charger B as follows:

► the positive (+) red cable to the (+) terminal

● the positive (+) red cable to the (+)

of battery A.

terminal of battery A,

It is not necessary to disconnect the

battery.

● the negative (-) black cable to earth point

► the negative (-) black cable to earth point C

C on the vehicle.

on the vehicle.

► Open the driver's door to wake up the vehicle

(or turn the ignition on without pressing the

brake pedal).

► Switch the ignition off.

► Switch off all electrical consumers (audio

system, lighting, wipers, etc.).

► At the end of the charging operation, switch

off charger B before disconnecting the cables

from battery A.

The hybrid system will automatically start

charging the 48 V battery after 1 minute with

a 12 V power supply higher than 13.5 V. The

current supplied by the battery charger should

be about 30-50A.

Charging the 48 V battery using a 12 V

battery charger

If the start fails, refer to the paragraph

"Starting using another battery" and follow the

recommended procedure.

When the appropriate energy level is reached

in the 48 V battery (between 30 to 40 minutes

depending on 12 V battery state of charge), the

hybrid system automatically stops the charging

process of the 48 V battery.

In case of failure, especially after long storage,

the 48 V battery may be discharged and require

a charging process.

190

In the event of a breakdown

(+) Positive terminal, protected by a red plastic

cover (not accessible).

(-) Negative terminal with a black quick-release

connector.

Charging the front battery using a battery

charger

For optimum service life of the front battery, it

is essential to maintain an adequate state of

charge.

► At the end of the charging operation, switch

off charger B before disconnecting the cables

from 12 V battery A.

10

► Refit the plastic cover to the (+) terminal, if

the vehicle has one.

► Operate the starter on the vehicle and let the

engine run.

► Wait for it to return to idle.

In some circumstances, it may be necessary to

charge the front battery:

► Allow the engine to run for at least 30

minutes, with the vehicle stationary, so that

the 48 V battery reaches an adequate state

of charge.

For access to the (+) terminal:

► When using the vehicle mainly for short

journeys.

► Release the bonnet by pulling the internal

release lever, then the external safety catch.

► Raise the bonnet.

► If the vehicle is to be taken off the road for

several weeks.

For rechargeable hybrid

versions

(+) Positive terminal with a quick-release

terminal.

(-) Negative terminal.

As the battery's negative terminal is not

accessible, a remote earth point is located

opposite the battery.

Consult a PEUGEOT dealer or a qualified

workshop.

The rechargeable hybrid system has two

accessory batteries: one at the front and one at

the centre of the vehicle.

To charge the vehicle's front battery

yourself, use only a charger compatible

with lead-acid batteries with a nominal

voltage of 12 V.

Central

Replacing the accessory batteries

Contact a PEUGEOT dealer or a qualified

workshop.

The central battery is located in the front armrest

storage compartment.

To reach the battery:

Jump-starting another vehicle

Do not start or jump-start another vehicle

using the vehicle’s accessory batteries.

Accessing the accessory batteries

Front

The front battery is located under the bonnet.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

It is not necessary to disconnect the

battery.

► Open the front armrest.

► Unclip the compartment's floor.

► Switch the ignition off.

191

In the event of a breakdown

► Switch off all electrical consumers (audio

system, lighting, wipers, etc.).

► Switch off all electrical consumers (audio

system, wipers, lamps, etc.).

► Remove clamp B by lifting it off.

Reconnection

► Switch off the ignition and wait for the

READY indicator lamp to go out.

Front battery:

► Observe a waiting time of 4 minutes.

Never reverse the order of the steps

for disconnecting and reconnecting the

accessory batteries - risk of irreversible

damage!

► Switch off charger B before connecting the

cables to the battery, so as to avoid any

dangerous sparks.

► Ensure that the charger cables are in good

condition.

► Connect the (+) terminal by connecting the

red quick-release clamp:

Central battery:

► Lift the plastic cover on the (+) terminal, if the

vehicle has one.

► Disconnect the (-) terminal using the black

► Raise lever A fully.

quick-release connector.

► Connect the cables of charger B as follows:

► Refit open clamp B on the (+) terminal.

► Push clamp B fully down.

► Lower lever A to lock clamp B.

Central battery:

► Positive (+) red cable to the (+) terminal on

Disconnection

battery A.

Front battery:

► Negative (-) black cable to earth point C on

the vehicle.

► At the end of the charging operation, switch

off charger B before disconnecting the cables

from battery A.

► Connect the (-) terminal using the black

quick-release connector.

Starting the vehicle using another battery

is prohibited.

Disconnecting/reconnecting the accessory

batteries

Procedure for disconnecting/reconnecting the

accessory batteries in the event of long-term

immobilisation of the vehicle (more than 1

month).

Following reconnection

After reconnecting the battery, turn on the

ignition and wait 1 minute before starting the

engine, to enable the electronic systems to

initialise.

Before disconnecting the accessory batteries:

► Disconnect the (+) terminal by disconnecting

► Open the driver's door and boot.

► Close all other doors.

the red quick-release clamp:

► Raise lever A fully to release clamp B.

192

In the event of a breakdown -> 12 V battery/Accessory batteries for Your Peugeot 408 4 Door Second Generation (2022-2026)

Related Topics

In the event of a breakdown

Popular Owner Manuals

Latest Owner Manuals