Neither headlights working

Seems to be only main beam lights that are covered by fuses . Check if power at bulbs , test bulbs but may be faulty switch

Peugeot 308 (2014 – 2018) – fuse box diagram
Year of production: 2014, 2015, 2016, 2017, 2018

Dashboard fuses
The fusebox is placed in the lower dashboard (left-hand side).

Version 1 (Full)
Peugeot 308 - fuse box diagram - dashboard (version 1)
Peugeot 308 – fuse box diagram – dashboard (version 1)
№
A
Functions
4 5 Emergency and assistance calls
6 A or B 15 Audio system, touch screen, CD player, navigation
11 5 “Keyless Entry and starting” system
13 10 Front 12 V accessory socket
14 10 12 V accessory socket in the boot
16 3 Glove box lamp, rear courtesy lamp
17 3 Vanity mirror lamp, front courtesy lamp
19 5 Instrument panel
21 10 Multifunction screen, air conditioning
22 5 Reversing camera, parking sensors
24 3 Rain and sunshine sensor
25 5 Airbags
28 A or B 15 Audio system (battery +)
30 20 Rear wiper
31 30 Locks
32 10 Hi-Fi amplifier
33 3 Memorisation of driving positions
34 5 Electric power steering
35 3 Seat belts not fastened display
Version 2 (Eco)
Peugeot 308 - fuse box diagram - dashboard (version 2)
Peugeot 308 – fuse box diagram – dashboard (version 2)
№
A
Functions
9 5 Emergency and assistance calls
13 5 Reversing camera and parking sensors
15 15 12 V accessory socket
16 15 Cigarette lighter
17 15 Audio system
18 20 Touch screen, CD player, audio and navigation system
19 5 Rain, sunshine sensor
20 5 Airbags
21 5 Instrument panel
22/24 30 Interior, exterior, front and rear locks
23 5 Glove box lamp, vanity mirror, front and rear courtesy lamps
25/27 15 Front/rear screenwash pump
26 15 Horn
30 15 Rear wiper
Engine compartment fuses
The fuse box is located in the engine compartment near the battery.

Version 1 (Full)
Peugeot 308 - fuse box diagram - engine compartment (version 1)
Peugeot 308 – fuse box diagram – engine compartment (version 1)
№
A
Functions
12 5 Park Assist control unit
14 25 Front and rear screenwash pump
15 5 Power steering
19 30 Front wiper motor
20 15 Front and rear screenwash motors
21 20 Headlamp wash
22 15 Horn
23 15 Right hand main beam headlamp
24 15 Left hand main beam headlamp
8 30 Diesel emissions control system (AdBlue®).
10 5 Automatic gearbox
12 15 Automatic gearbox
Version 2 (Eco)
Peugeot 308 - fuse box diagram - engine compartment (version 2)
Peugeot 308 – fuse box diagram – engine compartment (version 2)
№
A
Functions
13 5 Built-in systems interface
16 15 Front foglamps
18 10 Right hand main beam headlamp
19 10 Left hand main beam headlamp
25 40 Headlamp wash relay (aftermarket fitment)
27 25 Built-in systems interface
28 30 Diesel emissions control system (AdBlue®)
29 30 Front wiper motor
30 80 Pre-heater plugs (Diesel), additional programmable heating (aftermarket fitment), headlamp wash pump
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.