What causes a car igniter to have no power?

[SanZoe]

Car igniter loses power due to poor contact. More information about car igniter failures is as follows: 1. Sudden engine shutdown when using the igniter: This is usually caused by loose wiring connections or damaged wires grounding. 2. Unstable engine shutdown after prolonged driving: Typically caused by high-speed misfiring of the igniter chip, requiring igniter replacement. 3. Severe engine vibration: If the car runs normally before igniter installation but shows unstable idle speed and severe engine vibration when accelerating after installation and debugging, sometimes accompanied by backfiring from the exhaust pipe, and no improvement after ignition timing adjustment, it's usually due to reversed connection of the sensor's red and black wires.

[BryceMarie]

I've been driving for years and have encountered the cigarette lighter losing power several times, all due to blown fuses. That little strip in the fuse box under the dashboard is prone to overload, overheating, and breaking, especially when plugging in a phone charger or high-power power bank for too long. To check, you can open the fuse box cover, locate the fuse marked with the cigarette lighter icon, pull it out to see if it's blown, and try replacing it with a new fuse of the same amperage. Don't replace it with one that's too large, as it could cause a short circuit and be more dangerous. To prevent this, avoid connecting high-power devices regularly. If replacing the fuse doesn't work, the cigarette lighter plug might be rusty or worn out and deformed—cleaning the contact points might restore it. Loose wiring connections can also cause power loss, so it's best to have the electrical system checked during regular maintenance for safety.

[SanCarmen]

When the cigarette lighter in a family car suddenly loses power, it can be quite urgent. Just last week, my phone wouldn't charge when plugged in. The most likely cause is a blown fuse, as the cigarette lighter circuit is designed simply and can easily overheat and burn out the fuse with frequent use. Locate the fuse box, usually under the drawer next to the driver's seat, and replace the fuse. A deformed lighter plug or carbon buildup can also cause poor contact—try removing and cleaning it. Keep children from inserting random objects to avoid short-circuit risks. Worn-out wiring, such as damaged insulation, can lead to localized interruptions, so check the connections. Insufficient battery power might indirectly affect the cigarette lighter, though this is less common. Develop the habit of avoiding high-power devices to prevent overload and address any issues promptly.

[McMia]

A non-functional cigarette lighter is usually caused by a blown fuse or plug issues. The fuse is located in the fuse box with clear markings, and replacing a small piece will suffice. If the cigarette lighter plug is clogged with dust or deformed, it won't make contact with the metal point, resulting in no power—try cleaning the socket. Occasionally, aging wires or short circuits can also interrupt the current. For older vehicles, don’t overlook loose connections in the cigarette lighter circuit; tighten them yourself or consult a mechanic. Don’t delay too long, as it may affect the use of charging devices.