What should I do if voltage drop is too high?
What should I do if voltage drop is too high? If the voltage drop exceeds specification, check for corrosion, frayed strands of wire, loose connections or a battery cable gauge that is too small. Ensure the vehicle’s batteries have been tested and that the terminals have been cleaned and tightened. 1) Ensure the battery is charged to 12.4 volts minimum. How does a voltage drop test work on a car? A voltage drop test will assess voltage losses at the battery, the alternator and the starter. 1) With the voltmeter connected to battery, and key and engine off, record a...