Get In the event of a breakdown -> 12 V battery/Accessory batteries Guide for Peugeot 308 4 Door 2021-2025

In the event of a breakdown

Wash your hands afterwards.

► Remove the ﬁxing screw(s) from the access

ﬂap located under the bumper using a Torx

screwdriver.

► 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.

► For the reversing lamp: pull out the bulb and

replace it.

PEUGEOT 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 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.

8

Electronic control units/LED

technology headlamps

Never connect the negative jump lead to the

metal part of the electronic control units or at

the back of the headlamps.

Risk of destroying the electronic control

units and/or headlamps!

Connect to the remote earth point provided

for this purpose.

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

Frozen battery

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.

Fuses

Lead-acid starter batteries

Changing a fuse

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.

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.

Automatic gearbox

Never try to start the engine by pushing

the vehicle.

Dispose of used batteries at a designated

collection point.

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.

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.

Symbols

No sparks or naked ﬂames, no smoking.

Always protect your eyes. Explosive

gases can cause blindness and injury.

189

In the event of a breakdown

Keep the vehicle's battery out of the reach

As the battery's negative terminal is not

accessible, a remote earth point is located near

the battery.

of children.

The vehicle's battery contains sulphuric

acid which can make you go blind or

Starting using another battery

cause severe burns.

For more information, refer to the

handbook.

Explosive gases can be present close to

the battery.

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.

► 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.

► 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.

► 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.

Never start the engine by connecting a

battery charger.

With petrol/Diesel engines

Procedure for starting the engine using another

battery or for charging a discharged battery.

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.

Accessing the battery

The battery is located under the bonnet.

For access to the (+) terminal:

► Release the bonnet by pulling the internal

release lever, then the external safety catch.

► Raise the bonnet.

(+) Positive terminal with a quick-release

terminal.

► 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.

(-) Negative terminal.

190

In the event of a breakdown

► Allow the engine to run for at least

30 minutes, with the vehicle stationary, so that

the battery reaches an adequate state of charge.

It is not necessary to disconnect the

battery.

If this label is present, use only a 12 V

charger to avoid causing irreversible

damage to the electrical components.

8

► Switch the ignition oﬀ.

► Switch oﬀ all electrical consumers (audio

system, lighting, wipers, etc.).

Driving immediately without having

reached a suﬃcient level of charge may

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

Stop & Start).

24V

12V

Charging the 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:

– When using the vehicle mainly for short

journeys.

Disconnecting/reconnecting the

battery

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.

Before disconnecting the battery:

► Close all openings (doors, boot, windows,

roof).

► 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.

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

several weeks.

► Switch oﬀ all electricity-consuming devices

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

► Switch oﬀ the ignition and wait for 4 minutes.

After accessing the battery, it is only necessary

to disconnect the (+) terminal.

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

vehicle has one.

► Connect the cables of charger B as follows:

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

of battery A,

Consult a PEUGEOT dealer or a qualiﬁed

workshop.

To charge the vehicle's battery yourself,

use only a charger compatible with

lead-acid batteries with a nominal voltage of

12 V.

• the 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.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

191

In the event of a breakdown

Quick-release terminal clamp

Disconnecting the (+) terminal

► Push clamp B fully down.

Jump-starting another vehicle

Do not start or jump-start another vehicle

using the vehicle’s accessory batteries.

► Lower lever A to lock clamp B.

► Depending on equipment, lower the plastic

cover on 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.

Accessing the accessory batteries

Front

The front battery is located under the bonnet.

The Stop & Start system may not be

operational during the trip following the

ﬁrst engine start.

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).

► Depending on equipment, lift the plastic cover

on the (+) terminal.

► Raise lever A fully to release clamp B.

► Remove clamp B by lifting it oﬀ.

For access to the (+) terminal:

► Release the bonnet by pulling the internal

release lever, then the external safety catch.

► Raise the bonnet.

(+) Positive terminal with a quick-release

terminal.

Reconnecting the (+) terminal

With Rechargeable hybrid

engines

The rechargeable hybrid system has two

accessory batteries: one at the front and one at

the centre of the vehicle.

(-) Negative terminal.

As the battery's negative terminal is not

accessible, a remote earth point is located near

the battery.

Replacing the accessory batteries

Contact a PEUGEOT dealer or a

qualiﬁed workshop.

Central

The central battery is located in the front armrest

storage compartment.

► Raise lever A fully.

To reach the battery:

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

192

In the event of a breakdown

To charge the vehicle's front battery

yourself, use only a charger compatible

with lead-acid batteries with a nominal voltage

of 12 V.

► 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.

8

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

vehicle has one.

► Connect the cables of charger B as follows:

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

battery A.

• 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.

► Open the front armrest.

Follow the instructions provided by the

manufacturer of the charger.

Never reverse polarities.

► Unclip the compartment's ﬂoor.

(+) Positive terminal, protected by a red plastic

cover (not accessible).

(-) Negative terminal with a black quick-release

connector.

It is not necessary to disconnect the

battery.

Disconnecting/reconnecting the

accessory batteries

Procedure for disconnecting/reconnecting the

accessory batteries in the event of long-term

immobilisation of the vehicle.

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.

► Switch the ignition oﬀ.

► Switch oﬀ all electrical consumers (audio

system, lighting, wipers, etc.).

Before disconnecting the accessory batteries:

► Open the driver's door.

In some circumstances, it may be necessary to

charge the front battery:

– When using the vehicle mainly for short

journeys.

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

several weeks.

► Close all other doors.

► Switch oﬀ all electrical consumers (audio

system, wipers, lamps, etc.).

► Switch oﬀ the ignition and wait for the

READY indicator lamp to go out.

► Observe a waiting time of 4 minutes.

Consult a PEUGEOT dealer or a qualiﬁed

workshop.

Never reverse the order of the steps for

disconnecting and reconnecting the

193

In the event of a breakdown

accessory batteries - risk of irreversible

damage!

– Remote control key or electronic key

(depending on version).

– Sunroof.

– Electric windows.

– Date and time.

– Preset radio stations.

After reconnecting the battery, the

message "Collision risk detection

system fault" is displayed on the instrument

panel when the ignition is switched on. This

operation is perfectly normal. The message

will disappear while driving.

Disconnection

Central battery:

► Connect the (+) terminal by connecting the

red quick-release clamp:

• Raise lever A fully.

► Disconnect the (-) terminal using the black

quick-release connector.

Front battery:

Towing the vehicle

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

• Push clamp B fully down.

General recommendations

Observe the legislation in force in the

country where you are driving.

Ensure that the weight of the towing vehicle is

higher than that of the towed vehicle.

The driver must remain at the wheel of the

towed vehicle and must have a valid driving

licence.

When towing a vehicle with all four wheels on

the ground, always use an approved towing

arm; rope and straps are prohibited.

The towing vehicle must move oﬀ gently.

When the vehicle is towed with its engine

oﬀ, there is no longer braking and steering

assistance.

• Lower lever A to lock clamp B.

Central battery:

► Connect the (-) terminal using the black

quick-release connector.

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.

► Disconnect the (+) terminal by disconnecting

the red quick-release clamp:

• Raise lever A fully to release clamp B.

• Remove clamp B by lifting it oﬀ.

If minor problems nevertheless persist following

this operation, contact a PEUGEOT dealer or a

qualiﬁed workshop.

Referring to the relevant section, reinitialise

certain equipment:

Reconnection

Front battery:

194

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In the event of a breakdown -> 12 V battery/Accessory batteries for Your Peugeot 308 4 Door 2021-2025

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