Car Wouldnt Start Battery Replaced but Wont Start Again

If your auto wouldn't start, you may take automatically assumed that a dead battery was to arraign. So, what do you do when the car won't start afterward replacing the battery? The outset footstep is to figure out what is causing the problem.

You may have installed the auto battery wrong or there could exist an excessive corporeality of corrosion on the connectors. Aside from this, a defective starter or a seized engine could be to blame. Nevertheless, in rare cases, the ECM or immobilizer could take lost its settings and information.

Nosotros wait at all of these causes to aid you determine what'due south going on. Our guide also determines how to diagnose the problem for a quick fix.

Causes Car Won't Start Later on Replacing Battery

ane. Incorrectly Installed Battery

If you put a brand-new battery under the hood and it nevertheless isn't powering the machine, you need to cheque the installation. Did you clamp the cables downwardly tight and are they in good shape? If non, the battery won't supply power to start the car.

Additionally, information technology's important for the positive cable to be in good condition, down to where it meets the starter. Farther, the battery must be uniform with your vehicle. Machine batteries aren't universal. Y'all need a item size and chapters to beginning the engine in your vehicle.

You can't expect the current used to offset a four-cylinder motor to provide enough juice for your heavy-duty pickup truck. If yous are unsure what battery you need, check the owner'southward manual.

two. Connector Corrosion

Battery corrosion occurs over time on the terminal posts and connectors. Corrosion is acquired past the hydrogen gases that are released from the bombardment acid.

If the corrosion becomes excessive, it tin can interfere with the connection. In extreme cases, plenty corrosion tin can prevent the car from starting.

3. Defective Starter

If there is power to the car and the lights plow on, but you tin can't get the engine to offset, you might have a dissimilar problem. It's possible you lot diagnosed the dead bombardment incorrectly.

A defective starter tin can create a growling sound when you effort to start the vehicle. It tin can also lead to an absenteeism of sound at all.

RELATED: v Symptoms of a Bad Starter (& Replacement Cost)

4. Seized Engine

Some other possibility is that the engine is seized and yous mistook it for a bad battery. Recollect back to the last time the motorcar was running and you lot might notice some symptoms of an engine that'southward declining.

You could have noticed a burning smell or smoking. In that location might have also been unusual engine sounds, such every bit a knocking or tapping.

RELATED: Symptoms of a Seized Engine & Causes

5. Malfunctioning Alternator

If you lot were able to get the car started after installing the battery, only it didn't final long, the alternator might exist to arraign. Installing the fully charged bombardment might have given you lot the ability needed to get downward the road, only information technology won't final if the alternator doesn't recharge it.

This is one of the most common mistakes, replacing a battery when the problem is really with the alternator. That'south why it's of import to properly diagnose the expressionless bombardment before making a decision.

RELATED: 6 Symptoms of a Bad Alternator (& Replacement Price)

6. ECM Lost Stored Parameters

In some car models, information technology's possible that the control modules lose their settings and calibration when you remove the bombardment cable. This should not happen on most car models though, because the control modules should store the data without the battery.

However, it is withal a possibility and to ready it y'all need to visit a mechanic or someone with the right tools for a scale. It could also be an issue with missing data to the immobilizer.

How to Fix Car Won't Start After Replacing Battery

1. Bank check the Battery

Your first step must exist to cheque the battery. Start by looking at the connections to make certain everything is secure. You also want to verify that there's no corrosion on the connectors. If there is, use a mixture of blistering soda and water to clean it off. This ready is practically free and the well-nigh desired event.

If you lot are using the right battery and all of the connections look proficient, use a voltmeter to run into the status of the accuse. It should read 12.6 volts or higher. If it doesn't, the battery is dead. However, if information technology is a brand-new battery, yous should move on to the next step.

2. Inspect the Alternator

If you lot await online to get an alternator bank check, there are tons of people willing to give communication. Many publications will tell you to unplug the positive connection while the engine is running. If the car continues running, there's naught wrong with the alternator. However, this is a poor way of checking the alternator and it could actually crusade damage to the car's electronics.

Instead, test the alternator with a voltmeter while the auto is running. If you have a fully charged battery under the hood, the voltage of information technology should jump college when the engine is running. That'due south considering the operation alternator is charging it. If the voltage doesn't jump or information technology gets lower, the alternator is on its fashion out. If you lot aren't able to become the motorcar running for a check, take the alternator to your local auto parts shop for a costless check.

Alternator replacement could cost between $450 and $700. The majority of this expense is typically for the parts, ranging from $400 to $550, while the labor might add $50 to $150. In almost cases, it's elementary to replace the alternator at abode.

iii. Examination the Starter

If all of the interior lights and accessories work, but you lot can't get the car running, the starter should be looked at. There are multiple parts of the starter that can fail, including the motor and solenoid.

Many automobile parts stores volition test the starter for free. Just remove information technology and accept it to your local participating location if you lot aren't sure how to do this yourself.

Starter replacement could cost $150 to $700. Most starters cost between $50 and $300, while the replacement could add $100 to $400, depending on its location.

4. See a Mechanic

If the to a higher place steps haven't helped you lot figure out what's wrong, it's fourth dimension to visit a professional. You could be facing a larger issue and you want to go a proper diagnosis for your vehicle.

Sadly, if the engine is seized, y'all are facing a hefty repair pecker. Expect to pay $2,000 or more than for engine repair or replacement.

If the control modules or immobilizer lost its settings, y'all can expect effectually $100-$300 for a recalibration.

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Source: https://mechanicbase.com/troubleshooting/car-wont-start-after-replacing-battery/#:~:text=You%20may%20have%20installed%20the,lost%20its%20settings%20and%20information.

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