What causes the dashboard to light up but lose power when starting the engine?
4 Answers
The reason why the dashboard lights up but loses power when starting the engine is due to insufficient battery charge. More information about the battery is as follows: 1. When the ignition switch is turned on, the dashboard lights up, but at the moment of starting, the high starting voltage causes the dashboard to flicker or go dark, resembling a power loss, if the battery charge is insufficient. 2. If the battery is dead, you can jump-start it. If conditions do not permit, you can call your insurance company or a rescue service. Having a portable jump starter on hand can also quickly solve the problem. 3. The lifespan of a car battery is generally around 2 to 3 years, and its longevity is directly related to driving conditions, road conditions, and the driver's habits.
I've been driving for over a decade, and this kind of dashboard light issue followed by power cut during ignition is quite common. Usually, it's due to a weak battery where the voltage drops too sharply to handle the starting load, causing the entire system to cut off abruptly. It could also be an internal short circuit in the starter motor, triggering an automatic power cut protection when excessive current flows upon turning the key. Sometimes, it's caused by oxidized or loose battery terminals leading to poor contact—fine under normal conditions but failing during ignition due to vibration. I once encountered this issue when the battery terminals were severely corroded on a rainy day, and moisture got in. My advice is to check the battery voltage immediately—if a multimeter shows below 12 volts, it's time to recharge or replace it. Delaying could damage the car, and repeatedly doing this might even burn out the alternator. It's best to visit a repair shop promptly to avoid getting stranded on the road. Remember to turn off lights when parked to save power, and replace the battery every three to five years as it ages.
I'm a car enthusiast who often helps friends fix minor issues. If the dashboard lights up but the car loses power when trying to start, the problem likely lies in the starting circuit. During startup, the current can suddenly surge to hundreds of amps. If the battery is old with insufficient capacity or too much internal resistance, this instantaneous overload can trigger the system's protection to cut power. It could also be due to burnt or stuck contacts in the ignition switch relay preventing current flow, or a short circuit in the fuse box causing a fuse to blow. Try cleaning the battery terminals first, removing any rust to ensure good contact. Then use a test light to check if the fuses are intact. If that doesn't work, you'll need to check if the alternator is generating enough power to support the system. Remember, this isn't a minor issue – being unable to start the car affects work, and in severe cases, you might need to call a tow truck to take it to a repair shop. After fixing it, maintain your battery's health and avoid driving at night with low voltage too often.
This situation is quite alarming. The dashboard shows normal readings, but a complete power loss upon ignition indicates a significant risk of starting failure. Safety is my top priority, and it's highly likely caused by loose battery terminals or battery sulfation leading to rapid discharge. Moisture in the wiring harness can also cause short-circuit tripping. You should immediately check if the battery contacts are securely fastened. If the car can start, drive it to a professional shop to test the battery life and alternator. Don't delay, otherwise the car stalling at traffic lights would be dangerous - you'd need to turn on hazard lights and pull over. Regular vehicle maintenance should pay special attention to battery care and timely replacement - don't try to save money here as it could lead to major troubles. Safe driving with reduced risks is crucial.
