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Instructional video on voltage drop testing

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This guy Paul Danner is really a great automotive instructor and hits a lot of points home with his videos thereof. I have probably watched 8 hours or so of his documentaries and have learned a lot about OBD-II systems/troubleshooting as well.

Tom (PK)

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yes i watch the first few mins on the video and it seams to be very good. been wrenching for a few years and do mostly electrical and it is very important to load test your wires. i have been lazy a few times and it has burned me. it only takes a very small wire to be connected to get "good" voltage on a DVOM or test light when unloaded. but if you load it like he shows it will test bad. i cheat and use a head light so it puts a few amp draw on the smaller wires. bigger wires it don't work like for starters. if any one has a starting problem i recommend testing like he says.

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Good post Tom, I often use and suggest Voltage Drop Test. Its a great way to troubleshoot an electrical problem. sm01

I've seen lots of guys over the yrs change starters, alternators, switching equipment, batteries, etc. when the problem was bad connections, oxidized wires, etc...

You can "read" 12 volts through a single strand of wire but cant turn a starter with it. THATS what a Voltage Drop Test will discover

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