#### Cleveland Apprentice

##### Senior Member

Hello,

I have a 12 volt DC circuit tester. Per the instructions, it is not recommended that it is used to test for power on computer circuits due to the risk of damaging the computer circuitry as a car's ECM and BCM, which I understand. For the heck of it, I used a INNOVA 3320 multi-meter and measured 6.3 ohms through the tester. At 12 volts this equates to (don't have exact figure) something like 1.9 amps. This seems too high for the bulb in the tester to draw that much current. Does anyone agree? Do I have to make adjustments for the resistance in the multi-meter test leads? How would I do this if required? Also, the bulb is not LED.

The INNOVA 3320 multi-meter is advertised at 10 MegaOhm input on DC circuits for safety. I don't understand this, can anyone explain this to me? Unfortunately, I am not well versed in this.

Thanks in advance!

I have a 12 volt DC circuit tester. Per the instructions, it is not recommended that it is used to test for power on computer circuits due to the risk of damaging the computer circuitry as a car's ECM and BCM, which I understand. For the heck of it, I used a INNOVA 3320 multi-meter and measured 6.3 ohms through the tester. At 12 volts this equates to (don't have exact figure) something like 1.9 amps. This seems too high for the bulb in the tester to draw that much current. Does anyone agree? Do I have to make adjustments for the resistance in the multi-meter test leads? How would I do this if required? Also, the bulb is not LED.

The INNOVA 3320 multi-meter is advertised at 10 MegaOhm input on DC circuits for safety. I don't understand this, can anyone explain this to me? Unfortunately, I am not well versed in this.

Thanks in advance!

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