Your vehicle’s alternator plays a crucial role in keeping the electrical system running smoothly. It charges the battery and powers essential components like the headlights, dashboard lights, and power windows while the engine is running. When the alternator begins to fail, your car can quickly experience electrical issues and even lose power completely. At Interstate Automotive, we provide expert alternator replacement and auto electric repair in the greater Olympia area. Here are five common signs that it may be time to replace your alternator. Problems with Lights One of the most common signs of a failing alternator is dim or flickering lights. You might notice your headlights or dashboard lights growing noticeably weaker. Since the alternator powers your vehicle’s lighting system, inconsistent brightness often points to irregular power output. Weak or Dead Battery While batteries can wear out on their own, a weak or frequently dead battery can also be a symptom of a failing alternator. If you’ve replaced your battery recently but it continues to lose charge, your alternator may be the real problem. The mechanic can test your charging system to confirm whether the alternator is functioning properly. Unusual Sounds Under the Hood A failing alternator can produce unusual noises that indicate trouble. Grinding or whining sounds may come from a worn-out bearing or a belt issue in the alternator. Having the alternator inspected at the first sign of unusual noise can potentially prevent bigger problems. Warning Light on the Dashboard Modern vehicles often feature a dashboard warning light shaped like a battery or labeled ALT or GEN. When this light turns on, it’s a signal that your charging system isn’t working correctly. While this warning could indicate a battery problem, it frequently points to a malfunctioning alternator. Don’t ignore the light—have your vehicle checked by a professional to diagnose the issue before it worsens. Electrical Accessories Malfunctioning If your power windows, radio, or air conditioning begin to behave erratically, it could be due to inconsistent power supply from a bad alternator. The alternator may not be generating enough electricity to support all systems, especially when demand is high. When multiple accessories start acting up at once, it’s a warning sign that your alternator is no longer keeping up with your vehicle’s electrical needs. Alternator Replacement & Auto Electric Repair in Olympia, WA For auto repair in Olympia and the surrounding area, contact Interstate Automotive at  360-505-7292  . Feel free to give us a call to make an appointment!