How can you tell if an alternator regulator is faulty?
A simple way to check the alternator is to start the engine and connect a voltmeter across the battery terminals. If it registers battery voltage only, the fault is in the alternator or its wiring, or in a field isolating relay if fitted. If it registers an excessive charge (15 volts or more) the regulator is faulty and you should replace it.
How do you change the voltage regulator on a Bosch alternator?
Reassemble the alternator, reconnect the battery, start the engine and test (See How to test a car battery ). Replacing an externally mounted regulator on a Bosch alternator.
How is an internal regulator connected to an alternator?
Some internal regulators have a field connecting link from a terminal to the regulator body. The link protects the alternator from the battery when the ignition is switched off. You may need to slacken the link screw and move the link aside. Note the small plastic spacer.
How do you put a new voltage regulator in a car?
Fit the new unit, reconnect the leads, and then the battery. Start the engine and test the regulator. A typical separate type of electronic regulator. Although the trend is towards designing the electronic regulator into the alternator, some are still separate. A separate warning-light relay.
A simple way to check the alternator is to start the engine and connect a voltmeter across the battery terminals. If it registers battery voltage only, the fault is in the alternator or its wiring, or in a field isolating relay if fitted. If it registers an excessive charge (15 volts or more) the regulator is faulty and you should replace it.
Reassemble the alternator, reconnect the battery, start the engine and test (See How to test a car battery ). Replacing an externally mounted regulator on a Bosch alternator.
Some internal regulators have a field connecting link from a terminal to the regulator body. The link protects the alternator from the battery when the ignition is switched off. You may need to slacken the link screw and move the link aside. Note the small plastic spacer.
Fit the new unit, reconnect the leads, and then the battery. Start the engine and test the regulator. A typical separate type of electronic regulator. Although the trend is towards designing the electronic regulator into the alternator, some are still separate. A separate warning-light relay.