Mercedes-Benz Actros Mp4 fuse and relay

Mercedes-Benz Actros MP4 provides the 4th generation of the Actros range, which was produced in 2013, 2014, 2015, 2016, 2017, 2018. In this post, we will show a description of the fuses and relays Mercedes Actros mp4 with a box diagram and its location. Note the cigarette lighter fuse.

The diagram do not fit or the wrong generation?

[Description of Mercedes Actros mp1]
[Description of Mercedes Actros mp3 and mp2]

Fuse and relay box

The main fuse and relay box is located in the passenger compartment, at the bottom of the instrument panel on the passenger side.

To gain access, open the locks (2) and remove the cover (1).

The execution of the box and the purpose of the elements in them may differ from those presented and depend on the year of manufacture and the level of electrical equipment. Check the designation with your diagrams on the back of the protective cover.

Type 1

Type 2

Layout

Assignment

1. Relay module A32
2. Fuses, relays and diodes in the main module (GM)
3. Relay module A31.
4. Fuses for modules A1 and A2.

Relay module A32

• K1 – Heated windscreen
• K2 – Heated windscreen
• K3 – Additional headlight – clamp 56a
• K4 – Reserved
• K5 – Reserved
• K6 – Reserved

Master Module (GM)

SCA

Circuit breakers

Relay

• K1 – Reinforcement – clamp 15
• K2 – Reinforcement – clamp D+
• K3 – Reinforcement – clamp 15
• K4 – Oil cooled gearbox
• K5 – Reinforcement – clamp 15
• K6 – Trailer brake light
• K7 – Bistable relay
• K8 – Bistable relay
• K9 – Reserved

SSAM

Circuit breakers

Relay

• K1 – Reserved
• K2 – Reinforcement – clamp D+
• K3 – Oil cooled gearbox
• K4 – Reinforcement – clamp 15
• K5 – Reinforcement – clamp 15
• K6 – Trailer brake light
• K7 – Reinforcement – clamp 15
• K8 – Bistable relay
• K9 – Bistable relay

Relay module A31

Diagram

Appointment

Modules A1 and A2

Diagram

Decoding

Additional Information

Some fuses don’t have the usual look you’re used to seeing in cars, but their functionality is the same. Conventionally, all of them can be divided into fusible and automatic.

Checking the fuse

1. Remove the fuse from the module using pliers and visually inspect it.
2. If the fuse wire is blown, replace the defective fuse with a backup fuse.
3. Turn on the consumers of electricity and check their performance. If the fuse blows repeatedly, have the electrical equipment checked by a qualified specialist workshop.

Checking the automatic fuse

When the automatic fuse is activated, the pin (4) moves to the off position (2).

1. Remove the automatic fuse from the module.
2. Press the pin (4) to the on position (1).
3. Click on the release (3).
   – If the pin (4) moves to the off position (2), the circuit breaker is OK.
   – If the pin (4) does not move to the off position (2), the automatic fuse needs to be replaced.
4. Press the pin (4) to the on position (1) and reinsert the automatic fuse.
5. Turn on the consumers of electricity and check their performance. If the automatic fuse blows again, have the electrical equipment checked by a qualified specialist workshop.

That’s all. There is something to add – write in the comments.