I have no power from battery to the engine

Battery is good but no power to engine tried to jump start it and no good the horn won't blow as well as lights and gauges

My car has 165000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello.

If you are not getting power to the vehicle at all then there is likely some sort of wiring issue. I would carefully examine the battery cables and terminals for any signs of damage or corrosion that may be hindering their ability to conduct power. If the cables appear to be okay, I would then check the vehicle’s main fuses and relay for any signs of potential damage or the need for replacement. Get in touch with a certified technician, like one from YourMechanic, who can come to your home in order to service your car’s battery if you need some help with this. Good luck.

Regards,

Eduardo
YourMechanic

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The battery can be fully charged but still not be able to start the vehicle if it is failing or has a dead cell. Other likely issues are the fuel pump, ignition switch, battery cables, starter, or a clogged fuel filter.
Dead battery: A dead battery is the No. 1 cause of a no-start. If the battery is weak, but not totally dead, the starter may turn slowly.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter.
Your car battery can drain over time from stereo components (subwoofers), phone chargers, and anything you leave plugged into vehicle outlets that continue to draw power from the battery after the car is turned off. Other power drains include interior and below-vehicle LED lights. Loose or corroded connections.
Bad Sensors

One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.

If the car cranks when you turn the key, but the engine won`t start, it could be because fuel isn`t getting to the engine. One potential reason for this could be dirty fuel injectors. Over time, the fuel injector nozzles can become clogged with rust, corrosion or debris.
Low engine oil, loose cables, and a clogged catalytic converter commonly cause reduced engine power. Tighten loose cables or clean your oxygen and mass air flow sensors to bypass reduced engine power. Replace your battery or catalytic converter if they are damaged to override reduced engine power.
Faulty spark plugs result in an engine misfire due to incomplete burning fuel. An interrupted combustion process can significantly affect the engine performance. Unattended engine misfire may result in intermittent strange engine sounds, power loss, and engine knock.
If the voltmeter reads between 14-15 volts then the battery is normal. But if the battery reads over 15 volts or less than 13 volts, then there might be a problem with the alternator. The alternator is over charging the battery or not giving enough charge to the battery.
Volts and amps do not necessarily correlate. Most batteries that fail the performance test are fully charged when they come into the shop, dipping into the cells to check the specific gravity of the electrolyte is an unnecessary hazard.
Bad or dead battery

The most common reason cars don`t start is a dead or faulty battery. Even though most cars run on gasoline, they all require electrical power to function. The starter that cranks your engine to start requires an electrical signal to fire.

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