Why does my OnStar battery drain so much?
Community Answer In older vehicles running analog Onstar, the system will drain the battery because it is constantly looking for a signal. Onstar no longer offers an analog signal, only digital.
What causes a car battery to drain in the morning?
If your alternator has a bad diode, your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won’t start. 5. Extreme Temperature
How to get rid of negative battery drain?
Remove the negative battery cable from the negative battery terminal. Find the negative cable, which will be marked with a minus sign (-) and may have a black cover over it. Remove the cover, if applicable, and use a wrench to unbolt the negative cable from the terminal.
Can you use the radio with the battery off?
Yes, if it was connected straight to the battery rather than through the ignition. It should only draw a small amount for the clock when the ignition is off. If you can use the radio with the ignition in the off position, you have a problem.
Why does my Lexus RX300 battery keep going dead?
After an hour or so , dealer said it was a battery problem, and replaced the original battery with a new one. Today, after 4 weeks, the battery went dead again, this time, inside our garage. Couldn’t start it this morning.
When to know if your Lexus battery is draining?
If it is reading 250 miilamps or more, then you definitely have a drain. Then remove 1 fuse at a time and, starting with the under hood fuse panel and keep going until you find the circuit that is draining the battery. When you remove the correct fuse, the amp reading will drop down to the 50 or so milliamp target.
How can I Stop my Bike battery from draining?
Here are a few tips you can implement to prevent your battery from draining when plowing: Always plow in low range gear if your bike has this option. Make sure your battery is in good shape and not too old. Get a battery tender to top off your battery between each time you plow.
When do you know your battery is draining?
The amp reading should go down to about 50 miilamps or less. If it is reading 250 miilamps or more, then you definitely have a drain. Then remove 1 fuse at a time and, starting with the under hood fuse panel and keep going until you find the circuit that is draining the battery.
How can I find out if my car battery is draining?
Start by connecting a digital multimeter to the negative battery terminal of your vehicle. Then, remove the fuses one at a time while watching for changes in the multimeter’s reading. Once the reading drops, you’ve found the culprit and can take steps to repair it.
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.”.
Community Answer In older vehicles running analog Onstar, the system will drain the battery because it is constantly looking for a signal. Onstar no longer offers an analog signal, only digital.
How can I find out if my battery is draining?
Replace the fuse and disconnect each lamp, heater, or electrical device one at a time. Flip all of the switches that correspond to the components as well. Watch for the reading on the multimeter to drop to find out which component is causing the drain. For instance, say the offending fuse controls the power antenna as well as the radio.
When to look for a parasitic battery drain?
A parasitic drain is when an electrical device is using battery power when the car is closed, and the ignition key removed. Therefore, when doing this test make sure that the dome light, under hood light, trunk light, etc. are off.
Remove the negative battery cable from the negative battery terminal. Find the negative cable, which will be marked with a minus sign (-) and may have a black cover over it. Remove the cover, if applicable, and use a wrench to unbolt the negative cable from the terminal.