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What are the troubleshooting methods for a complete power failure in a car?

2 Answers

StEmersyn

07/28/25 4:03pm

The car's generator is malfunctioning. Circuit issues, such as grounding of the body harness or unauthorized modifications to the wiring leading to excessive current that burns out the wires. If the car loses power when the engine is not started, it may be due to loose or oxidized battery terminals, a blown main fuse, or a dead battery.

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DiAthena

08/11/25 11:07pm

I experienced the headache of a completely dead car battery with my old vehicle, and my troubleshooting experience suggests a step-by-step approach. The most common culprits are battery aging, loose or corroded terminals – first, get out and check the battery terminals, tightening them with a wrench. If you can’t even open the doors, it might be a dead key fob battery or complete power loss; keeping a portable jump starter or calling a tow truck is advisable. One winter morning, my car wouldn’t start due to aged wiring causing a short circuit. Since then, I regularly clean the terminals and apply Vaseline for protection, which has significantly reduced issues. Also, if the car sits idle for long periods, natural battery discharge can drain it – remember to drive it every few weeks to recharge. A dead battery isn’t just annoying; it can disrupt plans, so having a preventive maintenance routine is crucial.

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