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13 Alternator and Battery Testing and Diagnostic Tips

One Test Is Not Enough If only battery voltage is present at the battery on a running engine, does this mean the alternator is “bad?” No, it does not. That only means that the alternator is not charging, but does not reveal why. Therefore, it does not prove a faulty ­alternator. All too often the

Be Careful When Handling Alternators with Floating Stators

Some original equipment alternators made in recent years ­feature a “floating stator” that is more sensitive to proper handling than previous designs. Previously, the stator — the set of windings that surround the rotor — in most alternator designs, is press-fitted or in a tight tolerance. In recent years, however, some manufacturers have chosen to

Bosch-Stator alternator
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

Alternator failures
DENSO Expands Its First Time Fit Starter And Alternator Line

DENSO Products and Services Americas Inc. has expanded its First Time Fit starters and alternators that fit hundreds of popular passenger cars, sport utilities, trucks and crossovers from the 2007-’12 Escalade, Silverado and Sierra to the 2011-’13 Ford V8 Super Duty F-Series. With 246 new part numbers, DENSO starters and alternators now cover an additional

Remy Adds Delco Remy 38SI To Its High-Output Alternator Portfolio

Remy International has announced the launch of the Delco Remy 38SI, its latest high-output alternator. With this high-efficiency, mid-range amperage alternator, Remy offers customers a comprehensive portfolio of high-output products. With a number of innovative features, the 38SI is a unique product offering, according to Remy. Some of the features include: • Remote sense that

ACDelco Adds Professional Remanufactured Alternators, Starters

ACDelco has released an additional 143 Professional remanufactured alternator and starter part numbers covering 1992-2012 models from GM, Toyota, Chrysler, Ford, Honda, Nissan and other manufacturers.

Diagnostic Dilemmas: Solving Starter And Alternator Problems

The starter “solenoid” is actually a combination of an electric relay and solenoid. The relay portion electrically connects the starter armature to the battery. The solenoid portion mechanically engages the starter’s drive pinion with the engine’s flywheel gear.

Calculate Major Fuel Economy Savings From Delco Remy Alternators

Remy International, Inc. has launched an online fuel economy calculator to help customers better understand the positive impact the Delco Remy high-efficiency alternators have on fuel consumption.

Mercedes-Benz Tech Tip: Insufficient Alternator/Generator Output

On select Mercedes-Benz model vehicles, if you encounter insufficient alternator/generator (G2) output, the voltage regulator, integral to G2 output, may be malfunctioning. The voltage regulator may be replaced as a separate part and the procedure in this Tech Tip should be followed.

Tech Tip: Mercedes-Benz Alternator/Generator Voltage Regulator Malfunction

On some Mercedes-Benz vehicles, if you encounter insufficient alternator/generator (G2) output, the voltage regulator, integral to G2 output, may be malfunctioning. The voltage regulator may be replaced as a separate part and the procedure in this Tech Tip should be followed.