Power electrical devices Mercedes S-Class (W126)

Measuring devices
A multifunctional tester has been developed, specially designed for testing cars. With the help of such a device, it is possible to measure the number of engine...

Methodology for conducting measurements
Voltage measurement The presence of voltage in a circuit can be detected using a test lamp or voltage indicator. However, such a device only detects the presence of...

Battery — Removal and Installation
Removal Open the hood of the car. Remove the wires from the battery, first the ground wire (ground) (A), then the positive wire (B). Loosen the fastenings of both...

Battery charge
Do not allow a short circuit in the battery circuit under any circumstances, as this may cause it to heat up and explode. The electrolyte in the battery has a high...

Checking the battery
If you suspect that your battery is slowly draining, check your vehicle's electrical wiring as follows: Use a charged battery when testing. Set the ammeter to the...

Battery maintenance
Checking the electrolyte level in the battery Warning: Do not look into the battery using an open flame source. Battery explosion is possible! The electrolyte level in...

Troubleshooting the battery
Battery troubleshooting

Alternating Current Generator — Design Description
I. Alternator. 4. Pulley. 5. Fan. 6. Front holder (bracket). 7. Drive bearing. c. Rotor. 9. Rear bearing. 10. Washer. 11. Diode board. 12. Rear holder. 13. Voltage...

Alternator — Removal and Installation
Removal the generator Disconnect the battery ground wire. Disconnect the multi-pin plug connector from the rear wall of the generator. First, unfold the wire clamp with...

Replacing the alternator drive belt
Removal Loosen the fan belt and remove it. Depending on the vehicle model, it may be necessary to first remove the fan belts of other accessories, such as the air...

Replacing Generator Carbon Brushes
The condition of the carbon brushes should be checked every 60,000 km. Removal Removing brushes without removing the alternator. Disconnect the battery ground wire....

Voltage Regulator — Check
Depending on which generator is installed, a voltage regulator is also needed. Since the regulator contains transistors and thermistors, it must be replaced in any case...

Diagnosing faults in the alternator
Diagnosing faults in the alternator

Starter — design description
1. Electromagnetic relay (solenoid). 2. Starter (starting device). 3. Stopper. 4. Tie bolt. 5. Thorium cover. 6. Carbon brush holder (housing). 7. Carbon brush. 8....

Starter — removal and installation
Disconnect the battery ground wire. Remove the air filter. Lift the plastic housing off the starter solenoid valve and disconnect the electrical wires (see arrow)....

Starter fault diagnostics
If the starter does not turn, then first of all you should check whether there is the required voltage of 8 V at the terminal 50 of the electromagnetic valve. If the...

Engine Electrical Specifications
Engine Electrical Specifications Freezing point Normal climate Tropical well charged -65°C -40°C half charged -30°C -13°C discharged -12°C -6°C Ignition system Firing...

Bosch Generator — Design Description
1 - stator winding; 2 - cam rotor; 3 - brushes; 4 - diodes

Bosch starter — design description
1 - pole housing; 2 - pole shoe; 3 - excitation winding; 4 - anchor; 5 - collector; 6 - mounting thread; 7 - drive bearing; 8 - collector bearing; 9 - brush holder; 10 -...

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TEXTHTMLBB Code

W140 (1991-1998)