New battery and alternator but there is still no power in my 204 Xterra onve I turn it off.
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
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
Experienced mechanics share their insights in answering this question :
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 ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
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.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
New battery and alternator but there is still no power in my 204 Xterra onve I turn it off.
ANSWER : 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
We have a new battery, new alternator, new coil pk, new master fuse and the car still won’t hold power.
ANSWER : Hi there. The only thing that I could think possible is causing your problem is that something may not have been correctly installed while your son was completing this maintenance. However, if your engine was difficult to start before this service, it’s possible there are different components that are damaged that simply didn’t resolve the issue. The only way of knowing what is going on with your Trailblazer would be to have one of our mobile mechanics in your area come to your location and complete a car is hard to start inspection.
I have Chrysler 300c. Battery light came on, changed battery and alternator but power still getting drained and battery light still comes on.
ANSWER : Hi, thanks for writing in. This may be a sign of a failing starter relay. The starter relay is a small unit near the starter that directs power to the starter from the battery. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would suggest having a professional from YourMechanic come to your home to diagnose your starting issue to determine the solution to get you back on the road.
my battery kept draining until i bought a new alternator and battery. i have tightened the belt on the alternator but it still die
ANSWER : Hi there. The best way to diagnose why a battery would constantly drain is to review it’s job and how it is recharged. The battery is responsible for powering all electrical systems until the vehicle is started. At this point, the alternator takes over and also continually charges the battery while the vehicle is in use. A battery will drain when one of two things occurs. First, a battery will drain if it is constantly in use; supplying power to an electrical component even if the key is not in the ignition. Second, the battery will eventually die if the battery is not being charged frequently. However, since this is happening every two days, my initial thought would be that some electrical component on your 86 Olds is continuing to draw power from the battery. This is known as a parasitic drain. The best way to determine the source of this battery issue is to have one of our professional mobile mechanics come to your location and complete a battery will not hold a charge inspection.
I got a new battery new alternator put in but my battery just gets drained I keep having to buy new batterys
ANSWER : This may be a sign of a failing voltage regulator or potentially a bad grounding problem causing a draw on the system. The voltage regulator is a unit that regulates the charging of the battery by the alternator. Often times this will result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all. In either case, I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.
i have new battery new battery clamps and cables, new strter cilanoid and no power
ANSWER : Hello, thank you for writing in. If you are not able to get the starter to turn over or make any noise what so ever, then you need to start by checking the power supply to the starter solenoid. If it has a full 12 volt power supply available, then you are having either electrical or mechanical issues with the starter or the new solenoid. It may even need to be shimmed so that the gears are aligning correctly. If you do not have a full 12 volts available at the starter, then you need to trace down the electrical fault. You can start at the battery or the starter, and trace back until you find where the voltage from the battery drops off. There in lies your problem. For more help with this testing, contact our service department to schedule an appointment.
Battery drains quickly, New battery,Heavy drain, Replaced alternator , drain still there,goes away when bat. main 2 fuse is pulled
ANSWER : Hi there. It’s quite possible that you have one of two things causing the drain to the battery. First, you have a bad ground somewhere in the main relay or fuse box or an exposed wire somewhere that is not allowing the circuit to complete from the alternator to the battery. This can cause a battery draining issue as you’re describing, but it could also be one of multiple other electrical problems. The best way to pinpoint the exact source is to have a professional mobile mechanic come to your location and complete a battery will not hold a charge inspection.
Put a brand new alternator in it and new battery and it still does not want to charge the battery is this
ANSWER : Inspect fuse number 11 and 30 in the fuse box. Check the grey fuse link near the starter. If both of these are good then check fuse 19. In fact, its best to check all the fuses for any blown ones. Have the computers scanned to see if the computer has codes for the charging system. The alternator charging is controlled by the computer, and I have found that sometimes aftermarket alternators do not fix the problem. Some vehicles have more factory options for alternators than what the aftermarket offers. If the fuses do not help then you may have to replace the alternator with a dealer supplied one. On some of these vehicles they also had problems with the instrument cluster and connections to the cluster, which could be playing a part. If you cannot find the problem, then have a technician, such as one from YourMechanic, come and check the system for you.
