Instilled a new battery after my 04 3.3L Xterra would not start in the morning. The old battery was to small for it and did not look in good shape.
Drove it for a week then went to start it one day put the key in the ignition , dash lights lit up car was dinging like normal, turn the key and the car dies instantly. It was like I hit the off swich to the power.
Replaced the alternator, the ground wire from the battery, and had the new battery checked (the battery was good but they still gave me another new one). Installed new one and it started right up. Drove it for a day then went in to a st
Hi there. It sounds like you either have a defective alternator or there is another issue within the circuit for the charging system. I usually start by checking the output of the alternator. If it is not putting out the right voltage or amperage then it needs to be replaced. I would then check to see if the alternator is getting the correct signal to turn on. These would tell me if the output if correct. If the alternator is putting out the right voltage then the positive battery cable may have failed and may have high internal resistance. If you need to have this checked out, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the vehicle is losing electrical power] https://www.yourmechanic.com/services/electric-problems-inspection
How to Identify and Fix Common car Problems ?
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Hi, if you have a new battery and there is still no power coming to the car then there is a chance the main fuse has blown. This fuse protects the main electrical components from surges in power and will shut off all power in the car if blown.
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.
What Causes a Car Battery to Keep Dying? Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections, persistent electrical drains, charging problems, constantly demanding more power than the alternator can provide, and even extreme weather.
Flat or faulty car battery A flat battery is the most common reason your car won`t start and can be caused by a number of things, such as lights being left on, something in the electrical system causing a battery drain, or even a faulty battery that won`t hold its charge.
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.
Even if your lights, radio or accessories turn on, your battery may still be dead or undercharged. These components require a lot less power than the starter. Therefore, your battery may have enough ability to turn the radio/lights on, but not enough to turn on the starter.
Alternator issues – Many times, the alternator is the root of the problem when your check charging system/battery light comes on. Have your mechanic test the voltage coming from your alternator. If the voltage is low, your mechanic will likely replace your weak alternator with a new one.
One of the most common problems you`re likely to experience with an alternator is a failure in the bearings. There are needle bearings in the alternator that allow the rotor to freely spin inside the housing, and those bearings can break down over time as a result of exposure to heat and dirt.
But when someone mentions the “alternator fuse”, they`re generally referring to the primary, high-amperage fuse (or fusible link) between the alternator and the battery. Like any fuse, the primary alternator fuse acts as a circuit protection device.
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.
Why won`t my car start but the battery is good? If your car won`t start but the battery is good, the most common cause is a faulty starter – though it could also be to do with your fuel. You may have insufficient fuel to get the car going.
These include overcharging, undercharging and excessive vibration. Overcharging can kill a battery very quickly by boiling electrolyte out of the cells, and by overheating and warping the cell plates. Undercharging can shorten a battery`s life by allowing the plates to be come permanently sulfated.
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. If something`s wrong with your battery, your car engine won`t turn over.
Simply put, no car battery, whether healthy or dead, can charge itself. It always requires an external power source to get charged. Can Dead Batteries be Charged? Once a car battery is dead, the alternator will fail to recharge it completely.
The most likely issue is that a component is clogged. A clogged fuel filter is the most common reason, although a loss of power in your car could also indicate problems with the fuel pump or fuel line. Impurities or debris may be blocking the system, which causes the loss of power in a car.
The alternator is driven off the engine by a belt, which allows the alternator to convert mechanical energy into electrical energy through magnetic induction. Most of the time, there`s a high-amperage fuse or fusible link between the alternator`s battery terminal and the battery.
The most likely issue is that a component is clogged. A clogged fuel filter is the most common reason, although a loss of power in your car could also indicate problems with the fuel pump or fuel line. Impurities or debris may be blocking the system, which causes the loss of power in a car.