Electrical equipment and devices of the car BMW 7 Series E32

Heating system. General description
Outside air for heating is sucked in through the air intake grille of the air filter housing for the cabin under the windshield and then forced into the...

Heating/Air Conditioning Control Unit — Removal and Installation
Elements of the heating system 1 — heater fan; 2 - screw; 3 - stepless fan; 4 — cabin temperature sensor; 5 — heater temperature sensor; 6 - black vacuum hose;...

Heater Temperature Sensor — Removal and Installation
Removal Remove the heater control unit. Remove the temperature sensor plug. Fold the temperature sensor back and pull it out. Installation Insert the...

Air conditioning system
Elements of the air conditioning system (air conditioner) 1 - fan; 2 - evaporator; 3 — throttle; 4 - Low pressure service connection; 5 - High pressure service...

Diagnostics of heating faults

Electrical equipment. General information
When testing electrical system components, it is important to have an understanding of basic electrical terms: voltage, current, and resistance. Voltage is...

Measuring instruments
For measurements on the car electrical system, a universal measuring device is best suited - a multimeter, ammeter-voltmeter or tester. It combines a voltmeter...

Measurement technique
Voltage measurement The presence of voltage in a circuit can be checked with a simple test light or probe, but to determine the magnitude of the voltage, a...

Troubleshooting electrical equipment
If you suspect a fault in electrical equipment, you need to carry out diagnostics slowly and systematically, without missing obvious causes. The first step...

Fuses — replacement
To prevent short circuits and overloads in wires and current consumers, some circuits are protected by fuses. The fuses are located in the fuse box, which is...

Battery — Removal and Installation
Attention: When disconnecting the wires from the battery, you can erase data from the electronic memory units. The radio settings, clock settings and trip...

Instructions for working with a maintenance-free battery
BMW 7 series cars are equipped with a maintenance-free battery as standard. This battery no longer requires adding distilled water as part of maintenance, but...

Battery capacity — check
Checking the electrolyte level The electrolyte level in individual cans should be between the MIN (1) and MAX (2) marks. If necessary, unscrew the battery...

Battery — charge
The points marked with black diamonds are not performed on a maintenance-free AB. BMW cars are equipped with maintenance-free AB as standard. Warning: do not...

Battery troubleshooting

Generator. General description
BMW cars are equipped with alternating current generators. Depending on the model and configuration, a generator with a return current of 80.95 or 145 A can be...

Checking the generator voltage
Connect the voltmeter to the battery terminals. Start the engine. The voltage during the starting process may drop to 8 V (at a temperature of +20°C). Increase...

Generator — removal and installation
Removal Disconnect the negative cable from the battery. Insulate the negative battery terminal to prevent accidental connection. Remove the air filter. Remove...

Generator/Voltage Regulator Contact Brushes — Replacement/Check
Check the contact rings for wear, clean and polish them if necessary. Clean the contact surfaces and check the force of the contact springs, replace them if...

Generator fault diagnostics

Starter. General description
Bosch starter components 1 — collector body; 2 - brush holder; 3 - set of carbon brushes; 4 - metal-ceramic bushing; 5 - cap; 6 - excitation winding; 7 -...

Starter — removal and installation
The starter is located on the side at the junction of the cylinder block and gearbox, and it is removed downwards. Removal Disconnect the negative cable from...

Traction relay — checking, removal and installation
If the traction relay is faulty, the gear in the starter will not engage with the flywheel ring gear, i.e. the starter will not be able to turn the engine....

Starter fault diagnostics
If the starter does not rotate, then first of all you need to check whether there is a voltage of at least 10 V required for operation on contact 50 of the...

Windscreen wipers/washer. General information
The windshield wiper drive mechanism is located in the water drainage channel under the windshield. The windshield wipers and washers are controlled by an...

Windscreen wiper blade rubbers — replacement
Windscreen wiper blade rubbers need to be replaced if the glass is not cleaned properly. Both assembled blades and separate rubbers are available for sale. If...

Windscreen Wiper/Cowl Cover Drive Mechanism — Removal and Installation
Windscreen wiper motor and rods 1 - Windscreen wiper console; 2 - bolt; 3 - windshield wiper motor; 4 - engine crank; 5 — bolt; 6 - support sleeve of round...

Windscreen wiper motor — removal and installation
Removal Remove the windshield wiper drive mechanism. Unscrew the nut from the crank shaft and remove the crank. Unscrew the three windshield wiper motor...

Windscreen washer
1 - Filling hole cover; 2 - grid; 3 - ventilation channel; 4 — water (liquid) tank sleeve; 5 - plastic nut; 6 - water tank; 7 — washer pump; 8 - seal; 9 —...

Diagnosing Windscreen Wiper Blade Faults

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