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Voltage Drop Test | Delco Remy Tech Tip

The Voltage Drop Test Tech Tip video explains how to conduct a voltage drop test on the battery, alternator and starter. Electrical problems related to excessive voltage drops are more common than you may realize. High or unwanted resistance is one contributing factor that leads to cranking and charging system problems. High resistance is often caused by one of these four main issues: - Loose connections - Corrosion in the cables and wiring - Improperly sized wiring or cables - Improperly crimped connectors A visual inspection of cables and connections doesn’t show what’s going on inside the cables or inside the connections. Voltage drop testing is the only sure method of determining if there’s an adequate delivery path for optimum starting, charging, battery performance, and life. -- http://delcoremy.com -- Delco Remy starters and alternators from PHINIA are the preferred choice for medium and heavy-duty truck, bus and off-highway applications worldwide. Learn more at http://delcoremy.com. DELCO REMY is a registered trademark of General Motors LLC, licensed to PHINIA Technologies Inc. -- http://delcoremy.com -- What Does a Voltage Drop Test Do? A voltage drop test assesses voltage losses at the battery, alternator and starter. Learn how to measure voltage loss at each point: Voltage loss at the battery, voltage loss at the alternator, and voltage loss at the starter. -- http://delcoremy.com -- Safety Reminder The various electrical systems within a vehicle are highly charged and may include corrosive, poisonous, and hazardous materials. To remain safe, you must: - Know where the nearest eye wash station is located - Always wear eye protection - Remove any metallic items that could create an electrical charge including watches and jewelry - Never smoke near batteries - Never use batteries as a tool rest - Dispose of batteries properly when necessary - Follow usual safety precautions near rotating machinery