Showing articles & questions for topic
parasitic load

Related questions

Question
Battery draining.
Either your battery is due for replacement or you have a parasitic draw somewhere. A draw can be found by placing an ammeter in series with the negative battery cable. If excessive current draw is found, the cause of the...
Question
My car is not starting and does not make any noises while attempting to start
Hello there. A few problems can cause the vehicle to have a crank no start and they are all electrical. The most likely cause of the vehicle not starting is the battery. After the battery, the starter,...
Question
Battery draining for some reason.
It does sound to me that your car is experiencing an electrical component that is drawing power away from the battery. This most happens when the vehicle is off and sitting overnight just as was mentioned. From the description provided,...
Question
Parasitic drain on battery.
Hello, it sounds like you are really close to a solution since you know what is causing the draw. I would check with the relay that powers up the PCM. Locate the PCM relay in your owner's manual or fuse...
Question
Battery draining.
Your Saturn does not have any direct relation between the door locks and the anti-theft system from the factory. If you are having issues with both of these systems in the vehicle simultaneously and the battery is draining then it...
Question
New battery in truck being drained.
The battery's main purpose is to start the engine and provide a reference point for the alternator to use. If the battery is never charged by the alternator, (either because it has failed or the belt is no longer spinning...
Question
Car has parasitic battery drain.
I would have a technician such as one from YourMechanic do a parasitic drain test on the battery. This is where you connect a amp meter to the battery and pull out fuses until the drain stops to determine where...
Question
Something is draining the battery.
I would look inside the car for an interior light that is coming on first. Usually a glove box light or a trunk light that is staying on when the car is off. If it's not a light then a...
Question
Dashboard draining battery
First, let's determine if the engine is cranking. If the engine is not cranking it could be any one of these issues: weak or defective battery, bad battery cables, ignition switch, starter motor, seized or hydrolocked engine, or other wiring....
Question
Generator light on when engine is off
I had a difficult time finding information on this vehicle because my repair database does not go back to 1972. I found a generator wiring schematic on a website. Hopefully it's correct. The light should come on when the key...
Question
battery keeps going flat when left overnight
You didn't indicate the age of the battery. If the battery is "new" (less than 2.5 years old) and passes a load test, you should check for parasitic loads. With all car accessories off and key out of the ignition,...
Question
Battery is drained in the morning - 2010 Mercedes-Benz C300
Hello. You have either a faulty battery (a load test on battery can easily determine status of battery), faulty charging system, and/or a substantial phantom load (parasitic power draw) that is discharging the battery while the vehicle is turned off....
Question
Car won't start, battery drain - 1979 Mercedes-Benz 450SL
Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator. This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended that...
Question
Milliamps acceptable for parasitic battery drain
Yes, that's okay. Now, realize that depends on a car these days. Because some of these Mercedes, Audis, BMWs, they are running so much stuff, with GPS and satellite navigation and all kinds of other features. Some of those...
Question
Possible electrical issue - 2008 Dodge Avenger
Hello, thanks for writing in. A battery at 45% power is a bad battery. If it takes a charge and then is back to "45%" within hours, the battery is not holding a charge correctly. There is possibly a parasitic...
Question
Battery discharging while stopped, electrical devices were temporarily switched off.
The first thing to do with a draw is to check and make sure nothing is on that can be turned on by a human. Some common sources are interior lights, exterior lights, after market stereo systems or other after...
Question
One of the relays is clicking and draining the battery
There could be a parasitic draw involving the relay that is keeping it engaged. Lexus specifications for parasitic draw with the key off is approximately 50 milliamps. Anything over this amount indicates a parasitic draw. You could remove the fuses...
Question
Parasitic battery drain
When trying to locate the draw on a battery, I would normally use a process of elimination to locate where the draw(s) is coming from. With everything off, and measuring the draw, I would begin pulling individual fuses or relays....
Question
Truck running very bad and I have a loss of electrical power.
Hi there. Before you decide to charge or replace the battery, check for a parasitic draw. To do this, remove the negative (-) battery cable from the battery and put a digital volt ohm meter (DVOM) on the battery cable...
Question
My car is having repeated problems with the batteries going dead quickly
Have you had your alternator checked? Make sure the charging system is working correctly. Does the vehicle work after you jump start it? If the charging system checks out, the next thing is to check for a parasitic draw. This...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question