What kind of voltage regulator do I need for an alternator?
An electromagnetic voltage regulator with two switches, fitted to some older alternators. An older car may have a dynamo instead of an alternator.
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.
What’s the problem with my 1992 Mazda 323?
1992 Mazda 323 – just replaced the alternator and car ran OK for a few miles. Now at times the discharge light comes on and vehicle looses power, radio quits working and lights go dim. This problem comes and goes. Battery holds a charge so I don’t think that is the problem.
When do you need to replace an alternator in a car?
When you have tested the charging system of a car fitted with an alternator , and the checks in How to test a car battery point to a fault in the voltage regulator , make sure that you need to replace it. The fault may be elsewhere.
What causes an alternator to go over base voltage?
If you are getting more than 2 volts above base voltage, most likely your alternator is over-charging the battery or the battery is faulty. Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.
How to know if your alternator is working properly?
1 Check the drive belt or serpentine belt. Look for signs of wear or damage like cuts, shiny spots or missing chunks under the belt. 2 Also, check the belt tensioner for proper operation and damage. It should rotate freely. 3 Make sure the alternator is properly mounted. 4 Check the alternator for noises.
Is the alternator at the heart of the charging system?
Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology. The alternator is at the heart of the charging system of your vehicle. Alternator problems and charging system problems can affect your vehicle in different ways.
What happens when the diodes in an alternator go bad?
Alternators use diodes to rectify alternating current produced by the alternator into direct current. When one or more diodes go bad, the alternator can cause all kinds of problems. AC voltage leak can cause your lights to dim and drain power from your battery, for example.