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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz E-Class

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Mercedes-Benz E-class
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Mercedes-Benz
E-class
Introduction
Description of the model Mercedes E-Class
Working conditions and tools
Car Care
Diesel engines
Petrol engines
Transmission
Chassis
The brake system
Electrical
Accumulator battery
Starter
Generator
Checking the level of electrolyte in the battery, service contacts.
Checking the battery charge
Start the engine from the external power supply
Charging the battery
Removing the battery
Detection of faulty consumer
Checking the voltage regulator
Removing the generator
Removing and installing starter
Lighting
Sound and light alarm
Control equipment
Device combination
Cruise control (cruise control)
The system of airbags and seat belt pretensioners
Wires and fuses
Cable colors
Mounting block relays and fuses
Circuit breakers
Fuse Replacement
Combi-switch
Electrical circuits
Shop
Body
Applications
Diagrams
 


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Fuse Replacement



SEQUENCE OF WORK
1. If necessary, replace the fuse, you can use plastic tweezers, which included staffing tool.
2. Remove the blown fuse from the tweezers contacts.
3. A new fuse of the same rating, insert the contact. Watch out for contact reliability.
4. If the new fuse blows immediately, find out from Table. 9.1 was not whether the installed fuse smaller value than required.
5. If everything is correct, specify the table attached to the electrical circuit and test it separately. If necessary, use the appropriate wiring diagram.

SEQUENCE OF WORK
Fuse Replacement
1. If immediately after replacing the fuse blows newly installed, check the appropriate circuit.
2. In no case do not replace the fuse wire-clip or other "bugs". It is fraught with serious damage to the electrical equipment.
3. The car must always be a set of spare fuses (see. Table. 9.1).

Table 9.1. Mounting Relay and fuse box in the engine compartment


Fuse unit of lighting

On the left side of the front panel next to the light switch set to the fuse box, in charge of external lighting devices. The cover can be removed with a screwdriver
Fig. 9.39. On the left side of the front panel next to the light switch set to the fuse box, in charge of external lighting devices. The cover can be removed with a screwdriver


Shown in Fig. 9.39.
Included in the fuse box are shown in Table. 9.2.

Table 9.2. Fuses lighting equipment

Fuse in the battery compartment

Other fuse boxes (2), including overload protection (1) are located under the rear seat next to the battery
Fig. 9.40. Other fuse boxes (2), including overload protection (1) are located under the rear seat next to the battery


Shown in Fig. 9.40.
Included in the fuse box are shown in Table. 9.3.

Table 9.3. Fuses block located in the engine compartment battery

Technical Dictionary
Relay
What are the relays? Relays are used primarily in the chain of powerful energy consumers. For this there are the following grounds: when current is applied through a long wire through the switch formed voltage loss. In addition, the switch contacts because of the high current under heavy load. When included in the relay circuit to switch currents appear small, thus not directly included consumer himself and his relay.
Relay function.
If a team does not come at the inclusion of a switch, and the instrument from the mounting block in the engine compartment, the following occurs: sensitive electronic devices can not transmit high currents without the threat of damage.
When connected to the appropriate user supplied contact "86" current is closed in the relay contact "85" the "masses".
This magnetic coil closes the contact against the spring and closes the circuit to the "working current".
"Working current" in order to avoid voltage drop is supplied directly by the shortest route to the contact "30" relay and from there on - at the closed switch contacts - through contact "87" to the power consumers.
There's also the contact and "87a". It is firmly connected to the terminal "87" and has the same function.

PRACTICAL ADVICE
Troubleshooting relay
1. Contact "30" must always be energized, if not the relay, whose consumer depends on the other. For example: in the fuel pump relay current is applied only when the system works injection.
2. To check the voltage on the relay, remove it and contact probe with a lamp check contact "30" on the plinth of the relay. If there is no current, faulty wiring.
3. Remove the relay contact "86" connected to the positive terminal of the battery, contact "85" - with "weight". Actuation of contact in the magnetic coil of the relay must be clearly audible, otherwise the relay malfunctions.
4. Help with defective relay: remove the relay from the contacts. Install a jumper in the board relay contact between the contact "30" and "87" from paper clips or a short length of wire. Thus, the corresponding energy consumer will be under constant stress. To turn off the jumper must be removed as the corresponding switch in this case is overlapped.




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