If your Toyota Corolla isn’t charging the battery, it can lead to a dead battery and a car that won’t start. Below is a step‑by‑step guide to diagnose and fix the issue. Look at the dashboard: if the battery warning light stays on after starting the engine, it confirms a charging problem. Use a multimeter to check the battery voltage: Check the relevant fuses under the hood (usually rated 50 A and 7,5 A). Replace any blown fuses with ones of the same rating. Measure the voltage directly at the alternator’s output terminal while the engine is running. If the voltage is low there but the belt and...