Can a Car Generator Be Repaired?
2 Answers
Car generators cannot be repaired. Their function is to supply power to all electrical devices except the starter when the engine is running normally, while also charging the battery. The steps for replacing a car generator are: 1. Disconnect the battery cables; 2. Locate the alternator; 3. Unscrew the bolts and loosen the belt that secures the generator; 4. Remove the alternator, unplug and take out all nuts connecting the electrical components; 5. Install the new generator by reversing the process. Maintenance for car generators includes: 1. Clean accumulated dirt and dust from the generator's surface; 2. Check and adjust the tension of the drive belt; 3. Ensure the wiring between the generator and the regulator is securely connected.
I've been repairing cars for over a decade, and alternators are indeed repairable, but not all issues are suitable for DIY fixes. For example, if the carbon brushes are worn out or the bearings are making strange noises, you can simply buy replacement parts and install them yourself. I've helped friends replace carbon brushes before—the tools are simple and the cost is low. However, if the internal windings are burnt out or there's a diode failure, repairing it can be expensive and time-consuming, making it more practical to just replace the entire unit. When diagnosing, it's recommended to first test the voltage—normal charging output should be around 13.8 volts. If the output is unstable, further inspection is needed. A faulty alternator doesn't just affect charging; it can cause issues with the entire vehicle's electrical system, and breaking down on the road is even more troublesome. It's best to address any abnormalities early. DIY solutions are great for minor issues, but for major problems, it's more reliable to visit a professional repair shop.
