How Much Does It Cost to Fix a Parasitic Drain

The cost of repairing a parasitic drain will vary depending on the extent of the damage and the location of the drain. In most cases, however, the cost will be between $100 and $200.

If your car has a parasitic drain, it’s costing you money in two ways. First, the battery is being drained, which means it won’t last as long. Second, the alternator is working harder to recharge the battery, which uses more gas.

So how much does it cost to fix a parasitic drain? It depends on the cause. If it’s simply a loose wire or ground connection, a mechanic can usually fix it for around $100.

If the problem is with the alternator, it will be more expensive to repair. Either way, fixing a parasitic drain is worth the money because it will save you money in the long run. Not only will your battery last longer, but your car will also run more efficiently.

How Much is a Parasitic Drain?

A parasitic drain is a current that flows through a circuit when the circuit is turned off. This current can be caused by leakage in the power supply, or by devices that are still drawing power even when they are turned off. A parasitic drain can cause problems because it can discharge a battery, or it can cause corrosion on metals.

How Do You Fix a Parasitic Car Drain?

If you have a parasitic car drain, the first thing you need to do is identify where the drain is coming from. This can be done by disconnecting the negative battery cable and then using a multimeter to test for current draw. If there is a current draw, that means there is something in your car that is draining power from the battery even when the car is turned off.

Once you know where the parasitic drain is coming from, you can start troubleshooting. The most common cause of a parasitic drain is a faulty component in the electrical system that stays on even when the car is turned off. This could be something like a trunk light that doesn’t turn off, or an aftermarket stereo that doesn’t go into standby mode when the car is turned off.

Another possibility is a short circuit somewhere in the electrical system. To fix a parasitic drain, you need to find and repair the component that is causing it. If it’s something like a trunk light, simply replacing the bulb may do the trick.

If it’s an aftermarket stereo, you may need to disconnect it entirely or wire it so that it goes into standby mode when the car is turned off. For a short circuit, you’ll need to track down where the short is and repair it accordingly. This may require some trial and error, but eventually you should be able to fix your parasitic drain problem and get your car back to running properly again!

What is the Most Common Cause of an Excessive Parasitic Drain?

The most common cause of an excessive parasitic drain is a faulty battery. A parasitic drain occurs when current flows from the battery to ground when the vehicle is turned off. This can happen if there is a break in the circuit between the battery and ground, or if the voltage of the battery drops below 12 volts.

How Much Does a Battery Drain Test Cost?

If you’ve ever wondered how much it would cost to have your battery drain tested, the answer is that it depends on the type of test and the size of your battery. The most common type of battery drain test is the constant current discharge test, which measures the amount of time it takes for a battery to discharge when a constant current is applied. This type of test is typically used to determine the capacity or “health” of a battery, and usually costs around $30-$50.

Another type of battery drain test is called a pulse discharge test, which applies brief pulses of current to simulate real-world conditions like starting an engine or using power tools. Pulse discharge tests are generally more expensive than constant current discharge tests, costing around $100-$200. So, how do you know which type of test is right for you?

If you’re just looking for a general idea of your battery’s health, a constant current discharge test will suffice. However, if you’re experiencing unexplained battery drains or looking to diagnose an electrical problem, a pulse discharge test may be necessary.

Common Causes of Parasitic Battery Drain

A parasitic battery drain is when your battery is being drained even when your car is turned off. The most common cause of this is a faulty alternator, but it can also be caused by a number of other factors. If you notice that your battery is dying faster than usual, or if it dies completely while your car is off, then you may have a parasitic battery drain.

To test for this, first make sure that all of your accessories are turned off. Then, open your hood and disconnect the negative (-) terminal from your battery. If the problem goes away, then you likely have a parasitic battery drain.

There are a few things that can cause a parasitic battery drain:

1) A Faulty Alternator: The alternator charges the battery while the engine is running, so if it’s not working properly, the battery will slowly lose power. This can be caused by a number of things, including a bad diode or voltage regulator in the alternator.

2) A Short Circuit: Any time there’s an electrical shortcut between the positive (+) and negative (-) terminals of the battery, it will cause a Parasitic Battery Drain. This could be caused by something as simple as a loose wire touching both terminals.

3) A Leaking Capacitor: Many cars have capacitors that help to stabilize voltage levels in the electrical system.

If one of these capacitors starts to leak, it can cause a Parasitic Battery Drain. 4) A Stuck Relay: Relays are used to control electricity flowing to different parts of the car’s electrical system. If one gets stuck in the “on” position, it can cause electricity to continuously flow from the battery – even when the car is turned off!


According to the blog post, it can cost anywhere from $200 to $2,000 to fix a parasitic drain. The reason for the wide range in price is because there are a lot of variables that can affect the cost. Some of these variables include the severity of the problem, the type of vehicle, and where you take it to get fixed.