Voltage Drop Testing
The measurement of voltage is like the speed of the traffic.
VIDEO: Weak Battery? Don’t Reflash
A power supply to keep the voltage consistent is required. This video is sponsored by Auto Value and Bumper to Bumper.
Fuel Pumps And Voltage Drop – Still A Valid Test
Voltage drop testing compares the battery or charging voltage to the voltage at the component.
Voltage Drop Testing Is The One Meter Test That Doesn’t Lie
The measurement of voltage is like the speed of highway traffic – when loads are light, the voltage does not drop.
VIDEO: Diagnosing The Starter With A Voltage Drop Test
Andrew Markel shows how to voltage drop test a starter when there is a slow crank, despite the battery and starter having enough voltage. Sponsored by Bosch Automotive Service Solutions.
Alternators: Low Voltage To Battery
Most alternators fail electronically long before they wear out mechanically. Even so, the shaft bushings and brushes are wear items that don’t last forever. These parts can be ruined if the alternator is mounted low on the engine and is subjected to road splash that contains salt water or debris.
Avoid Alternator Returns, Make Peace With Your Parts Suppliers
If the charging voltage is low, or the alternator isn’t putting out enough current to keep up with the electrical loads that are placed upon it, don’t automatically assume the starter or alternator is bad and needs to be replaced (unless you’re bench testing the unit out of the vehicle). Many times an alternator is
