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Does the wiring in your classic car look like a plate of spaghetti? Wiring is something many owners are scared of, but we are here to help. Prepare to dive into electrical projects by getting familiar with a multimeter. This simple and affordable tool can be your lifeline in solving electrical problems for vintage rides. Hagerty’s Matt Lewis talks you through how to troubleshoot electrical gremlins like a professional by testing for voltage, ohms, and amperage. Hopefully this will spark your motivation!

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  1. Ham Gina

    This is a great video. I'd like to see a follow up video that details real world situations with corrosion on bulb sockets. It would be great to see how to measure resistance in a socket that is corroded that explains how to troubleshoot older wiring that might be susceptible to corrosion. An explanation of resistance metering in more detail would be helpful for the DIY crowd that is trying to determine why, for example, a turn signal bulb is working but flashing faster than the other side of the car. Measuring resistance would be a way to determine that the circuit can flow electricity via amps and voltage yet resistance is higher than normal which might be the cause of why the turn signal circuit is behaving erratically. This just happened to me last week and I spent hours learning about it when I bet one of these awesome simple videos would detail a more real-world scenario.

    I can't say enough how much I learn from these Hagerty DIY videos. Thank you very much!

  2. nodariel

    I love how in American accent it's a molt-ay-mee-tur so used to it being a molt-ee-mee-tur in the UK. Cool video though!

  3. Freedomquest08

    I use a mulitmeter so seldom that I have to stop and think twice about it each time I use it. These are good refresher tips for me regarding a very useful tool.

  4. Grizzly

    This is a very helpful and informative video on Multimeter function. It was a huge help for me and I am sure it will help hundreds if not thousands of others. Thank you

  5. rcadd1ct

    Using your fingers to hold the wires onto the test lead is a bad habit to get into. I was checking trailer wiring and a short made the wire get red hot. I got a nice brand on that one. It also trains you to get bit when you start working with AC circuits.

    Otherwise a lot of good info.

  6. Jarred May

    This was such a massive help in learning about how a multimeter works. Please do more of these types of videos!!

  7. racenuke

    Good analogy of amperes and voltage but I must disagree with you about the black wire. You were right at one point calling it the negative. You were wrong when you called it both the neutral and the ground. It is in fact neither ground or neutral.

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