Multimeter

Battery drain but multi meter shows it doesn't

Battery drain but multi meter shows it doesn't
  • 4352
  • Oliver McGee
  1. Why is my multimeter not reading current?
  2. How do I know if a fuse is blown on a multimeter?
  3. How can I tell if my radio is draining my battery?
  4. How do I test if my multimeter is bad?
  5. What should you not do with a multimeter?
  6. What setting should my multimeter be on for a car battery?
  7. How much current draw is acceptable?
  8. How do I drain my battery fast?

Why is my multimeter not reading current?

If you try to measure the current with a blown fuse, you'll probably notice that the meter reads '0.00' and that the system doesn't turn on like it should when you attach the multimeter. This is because the internal fuse is broken and acts as a broken wire or open.

How do I know if a fuse is blown on a multimeter?

Fuse is OK: If the multimeter reading changes to a low resistance value (similar to the result of touching the 2 leads together). Fuse is Blown: If the meter reading does not change and display still shows the original 100% resistance state. Don't forget to turn the multimeter OFF when you have finished testing.

How can I tell if my radio is draining my battery?

Once it disconnect from power, it will cut the power from the yellow wire, only keep the yellow wire's power for small memory IC for keeping setting data. If the yellow wire and black wire are connected correct, but the red wire being connected with permeation power, then the radio will drain car battery.

How do I test if my multimeter is bad?

Turn the dial on your multimeter to set it to measure voltage rather than resistance. Place the red probe against the positive terminal of the battery. Touch the black probe to the negative terminal. Ensure that the multimeter provides a reading of 9V or very close to it.

What should you not do with a multimeter?

Safety Tips to Measuring Voltage With a Multimeter

What setting should my multimeter be on for a car battery?

Multimeter Setting

For testing the electrical output from a vehicle battery, the multimeter dial should be turned to the “20 volts” setting. But before the multimeter can be used, all surface charge from the battery must be removed to allow for an accurate reading.

How much current draw is acceptable?

In fact, we suggest a 25-milliamp draw is acceptable and anything that exceeds 100-milliamps indicates an electrical issue that needs to be addressed.

How do I drain my battery fast?

To drain the battery faster, change your screen's brightness to maximum. Go to “Settings” > “Display” > “Brightness level” (or “Brightness“). You'll have to turn off “Adaptive brightness” or “Auto brightness” to turn up the brightness all the way.

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