Which test lights are computer safe? Measurements and fried electronics reveal the answer!

[@naturalbum7954]

This is exactly what happened to my ecu. The illustration is correct. He is referring to the driver. Inputs are normally high impedance so no effect. Do this on driver side and it will fry your ecu.

[@vincedelpezzo8209]

Very informative Joe

[@josephdennis450]

Good video i hardly trust the led tester much less the orther one prefer multimeter,thank for sharing.

[@MrEFHATCH1990]

Great video!

[@francpez7564]

I really enjoyed watching your video. Thank you for posting. You definitely answer some of my questions about light testers. Have a nice day.

[@AlwaysDiagnoseVehicleFirst]

Good morning Joe hope your day is going well!

[@alitehrani3415]

Thanks was great

[@garylewis3641]

Will a light always draw its maximum amount if the current supports it? Good video!

[@Riyad7]

Awesome. Thanks a lot for this video. Would you please tell me the name of that led test light? I am interested in buying a one of those.

[@drcod3r329]

I did subscribed thanks a lot

[@cuicoman]

If you connect the tester to a battery I can see how you can damage it but what if you connect the tester to a screw or just a random metal. Can you still damage the computer.

[@laldogpaul568]

The ECU would cut the circuit off before that type of damage was caused. I have seen dead shorts on ECU's and they recover once reconnected,they are much more complex than your simple set up in this video.

[@joecandoit5341]

I believe it, just demonstrating the concept in its simplest form.

[@charlesdowns1691]

isnt digital multimeters safe?

[@charlesdowns1691]

i like you answer best

[@bltoth1955]

ScannerDanner says the Incandescent bulb won’t fry your electronics but the led might. Which is it?

[@fastestcaskets5020]

He never said the LED test light may harm a computer.

[@wildwoodtop]

​@@fastestcaskets5020 Why doesn't ScannerDanner convey the reason why he doesn't use a Multimeter get the results he's looking for

[@fastestcaskets5020]

​@@wildwoodtop What?

[@wildwoodtop]

@@fastestcaskets5020 why would you even consider using a test light 🤔 wouldn't a multimeter be safe for low current testing with no chance of frying electronics / ECM ?

[@bamaboy6207]

does he not know all pcm are protected from that unless its an late 80's model car!! does he not think sensors short all the time the inputs are all protected so dont let his test light info deter you

[@ericheugebaert7671]

8

[@charlesdowns1691]

i thought i heard digital multimeters are safe? i dont really trust them