How to Check or Test Polarity on your Vehicle

[@itsamilkshake]

Thank you for this thorough and helpful video.

[@4DIYers]

No problem and thank you for the feedback!

[@mrcutestuff]

It's been a while, I was getting worried! I hope all is well!

[@joeysokool]

Thank you for this video.....very educational

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[@Napalmgas]

Thanks for the free education?

[@4DIYers]

No problem, happy I could help!

[@Ruthlessbone]

Do you have to have the key switch on?

[@4DIYers]

Depending on what you are testing. If the circuit is always on without the key, then no. If it's a switched circuit, then yes.