What causes a parasitic battery drain in a car?
What causes a parasitic battery drain in a car?
A parasitic battery drain is when an abnormal and continuous discharge of power occurs after having shut off the engine. Usually, this is caused by a short circuit or an electrical device that remains in the “on” position or energized, such as: But a battery-power drain can also be the work of a bad alternator diode or even a faulty battery.
What does it mean when your car battery is draining?
A parasitic battery drain is just something that consistently and continually drains your battery. This could be a faulty relay, a headlight/dome-light switch, alternator, or any other electrical gremlins. Taking your car to a mechanic with an “unknown” culprit can cost you big bucks as well.
How to diagnose a parasitic battery drain test?
Car battery problems, specially a parasitic battery drain, are difficult to diagnose sometimes. New vehicle models make it specially difficult, time consuming, and frustrating. They come with more control modules than previous year models and hundreds more electrical circuits.
Is there such thing as a parasitic battery?
It doesn’t involve parasites in your battery, so that’s a good thing. No need for HazMat suits, yet! A parasitic battery drain is just something that consistently and continually drains your battery. This could be a faulty relay, a headlight/dome-light switch, alternator, or any other electrical gremlins.
How to check for parasitic battery drain in a car?
Attach a multimeter (set the dial on the multimeter to measure Amps as per multimeters instructions) between the negative cable and the negative battery post. Wait a few seconds to several minutes for the car to go into sleep mode — i.e. when you make the contact with the ammeter, the car’s computer systems “wake up.”.
A parasitic battery drain is just something that consistently and continually drains your battery. This could be a faulty relay, a headlight/dome-light switch, alternator, or any other electrical gremlins. Taking your car to a mechanic with an “unknown” culprit can cost you big bucks as well.
It doesn’t involve parasites in your battery, so that’s a good thing. No need for HazMat suits, yet! A parasitic battery drain is just something that consistently and continually drains your battery. This could be a faulty relay, a headlight/dome-light switch, alternator, or any other electrical gremlins.
How to fix a parasitic drain on a multimeter?
Disconnect the negative battery cable. On the amperage side of the multimeter dial, set it to 20 amps. Disconnect the negative battery cable. Touch a lead to the negative battery cable terminal. Touch the other lead to the negative battery post, completing the circuit within the multimeter, which will display the amp draw.
