What are the reasons for a car battery having power but no response when starting?
2 Answers
The reasons for having power but no response when starting include the following: 1. Starter damage: (1) Symptom 1: No response when turning to START. The starter electromagnetic switch is damaged. (2) Symptom 2: A "click" sound is heard when turning to START, but the starter does not rotate. The main contacts of the starter electromagnetic switch are damaged, or the starter winding is damaged. (3) Symptom 3: A "click" sound is heard when turning to START, and the starter rotates at high speed. The starter one-way clutch is damaged. 2. Engine ignition system failure: The symptom is that when turning to START, the engine can be rotated (100r/min), but the engine does not start. Unplug the high-voltage wire (or ignition coil), and there is no spark when turning to START. 3. Engine fuel supply system failure: When in the IG position, the "buzzing" sound of the fuel pump working in the fuel tank area cannot be heard.
I also encountered this situation when driving my old van. The battery appeared fully charged, but there was no sound at all when trying to start it. It's mostly likely that the starter motor is stuck or the starter relay is broken. I remember my car had this issue and caused me to push-start it several times, especially during cold morning starts. If the dashboard lights up when turning the key but the engine doesn't respond, focus on checking the relay box in the engine bay. Try gently tapping it with a hammer to see if it can recover. Also, loose wiring can cause this issue—check if the wiring from the battery to the starter is corroded or has poor contact. Lastly, don’t forget to check if the car key is locked by the anti-theft system, as some issues with the key chip can also prevent ignition. If nothing works, it’s best to visit a nearby repair shop as soon as possible to avoid making the no-start issue even worse.
