Power Problems: Troubleshooting Your BMW 745i Alternator
Your BMW's battery, no matter how reliable it is, won't be able to supply sufficient power to all your electrical components without its sidekick, the alternator. Run with a busted BMW 745i alternator and you'll soon find yourself stuck in the middle of the road with a dead engine. To make things worse, your headlights, radio, and even your A/C will all go kaput once the alternator fails to charge your car's battery. If you're having power problems with your vehicle, do some troubleshooting on the alternator right away. This will not only nip any problem in the bud before your alternator breaks down completely, but it will also save you from high repair and replacement costs. Here's a quick guide to help you out:
Malfunctioning electrical components
Flickering car lights, faulty A/C, and a dead music player are common signs of alternator damage. These danger signs will become more noticeable as the alternator weakens. With its dwindling power capacity, the alternator won't be able to supply enough electricity to charge all electrical components at the same time. When this happens, your lights, A/C, music player, and ignition system won't be able to function at maximum capacity. Before popping the hood open and doing some DIY repairs, check the alternator indicator service light on your dashboard. If it flickers or fails to light up when you start your engine, then you definitely have an alternator problem in your hands. Check the alternator's electrical plug and wiring for damage. Frayed wires and faulty plugs should be replaced right away.
A battery that frequently discharges or produces low voltage output is another sign of a bad alternator. These two, together with the voltage regulator, work hand-in-hand to keep all your car's electrical components running properly. Use a voltmeter to test the battery while your car is idling. The reading on the voltmeter should be around 14 to 15 volts. A reading that is less than 13 volts indicates a bad alternator. Have a mechanic check your battery, voltage regulator, and alternator for damage, and replace any malfunctioning part as soon as possible.