Diagnosis of electrical faults BMW 3 Series E46

Diagnosis of malfunctions of onboard electrical equipment — general information
A typical electrical circuit may include an electrical component, various switches, relays, motors, fuses, fuses or circuit breakers related to that component,...

Fuses — general information
The electrical circuits of the vehicle are protected by a combination of fuses, circuit breakers and fuse links. A blown fuse is easy to distinguish from a...

Replacing fuses
To protect wires and consumers of electrical devices from short circuits and overloads, electrical circuits are protected by fuses. The fuses are located in a...

Fusible links — general information
Protection of some circuits is carried out by including fusible links in their electrical circuit. Inserts are usually used to protect non-fused circuits such...

Circuit breakers (thermal relays) — general information
Thermal relays are used to protect components such as electric windows, door locks and headlight adjustment. Some of the circuit breakers are housed in a fuse...

Relay — general information
Relays are used to supply electrical current to components in some of the vehicle's electrical accessories. Failure of the relay to function properly leads to...

Checking the wiper motor
The wiper motor is located in the water tank under the windshield. To check it, you need to remove the cover. Terminal designation Terminal 31 - earth...

Stoplight test
1. If the brake light does not light up when the brake pedal is pressed, you must first check the corresponding fuse. 2. If the fuse is good, check the brake...

Checking the heated rear window
After turning on the rear window heating, after a while the field with visible lines of conductors should be cleared of precipitation or snow. 1. If there is a...

Removal and installation of the temperature sensor
Withdrawal The outside temperature sensor is located in the trim on the left under the front bumper. 1. Remove the temperature sensor -1- from both plastic...