Symptoms of a Bad BMW 2002 Alternator
Other than the battery, a BMW2002 alternator keeps your car's electrical components working. It runs everything in and on the car that needs electricity: power windows, radio, headlights, the spark plugs in the engine, and many more. If the electrical warning light on your dashboard lights up, stop the car and find out what's wrong. There's no point in riding and driving your car if you have a broken one. Here are some things you should look out for to detect the signs of a bad BMW 2002 alternator:
Lack of power
Various electrical devices on your car that begin to fail or weakly run one by one are a sign of a bad BMW 2002 alternator problem. Headlights may become dim, the radio doesn't work, the air conditioning feels weak, some lights die, or the engine has difficulty running.
A voltmeter is a good tool to help you check the condition of the BMW 2002 alternator and battery. The car should give a reading around 14 volts with just the engine running and all devices off. When devices are turned on, it should drop to about 13 volts. Your BMW 2002 alternator should be replaced if the readings on both setups are significantly lower than expected.
A BMW 2002 alternator in good condition should run smoothly and quietly. If you happen to hear an unusual high-pitched noise, this is not a welcoming tune. It's usually caused by one, or a combination of three things: a bad drive belt on the alternator, worn bearings inside the alternator, or defective diodes. Replacing or tightening the belt drive should fix the problem. If this doesn't solve the issue, a new alternator is necessary.
The smell of burnt rubber may signify a bad BMW 2002 alternator. This is due to the friction produced by the drive belt rubbing too much on the metal parts. Aside from the belt, your car may simply be using an overheated alternator. This is usually caused by an alternator not rated high enough to supply the electrical demands of the devices in your car.