Every tech knows that if you place your voltmeter leads across the posts of the battery, you’ll read battery voltage on the meter. But what happens if you move the positive lead from the battery post to the engine block (or any other ground for that matter) and still read voltage? Understanding why you read voltage when you shouldn’t – and demonstrating some practical voltage drop testing techniques – are just a few of the highlights you can expect in this Motor Age/TST webinar, Measuring Voltage When You Shouldn't.