Power electrical devices BMW 5 Series E34

Generator — general information and device
On BMW cars, an alternator is installed. Depending on the model and composition of the equipment, the generator power can be from 80 A to 115 A. The generator...

Alternator Safety Precautions
When working in the engine compartment, be sure to disconnect the ground wire from the battery. Do not interchange the wires of the voltage regulator and the...

Removal and installation of the generator
Note: Additional instructions for 520i/525i models from May 1990 are at the end of this section. Withdrawal On models 518i, 520i, 525i: Disconnect the ground...

Replacing and checking the carbon brushes of the generator and voltage regulator
Bosch generator Withdrawal Remove alternator and rear cover. Disconnect the ground wire from the battery. Unscrew the voltage regulator from the back of the...

Checking the voltage regulator
Connect a voltmeter to the positive and negative battery terminals. Start the engine. During start-up, the voltage can drop to 9.5 volts. Increase the speed to...

Starter — general information and device
To start an internal combustion engine, a small electric motor, a starter, is required. To start the engine, it is necessary that the starter develop up to 300...

Removal and installation of a starter
The starter is located on the side of the junction of the engine with the gearbox and is removed upward. Withdrawal Caution: Disconnect the battery to avoid...

Removal and installation, check of the traction relay
With a defective traction relay, the starter gear does not engage with the flywheel ring gear. Because of this, the starter is not able to crank the engine....

Starter Troubleshooting
If the starter does not turn the engine, first check for a voltage at terminal 50 of the traction relay of at least 8 volts, sufficient to operate the traction...