What will a faulty voltage regulator do?
A bad voltage regulator can even affect your car’s engine. For example, as this car part stops working properly, you might notice your car’s engine sputters or stalls once in a while. It might also have trouble accelerating as you drive.
Can a 15vdc alternator overcharge a car battery?
15VDC is not unheard of, I’ve seen it with my own truck, and the previous D****. The ECM should trigger a fault code on an overcharge condition…it should be able to turn the alternator off too. Alternator Overcharging? No the battery will only loose voltage when going bad.
Why does my Chevy Tahoe have a high voltage reading?
Just a note to those with electrical issues…an item USING power cant draw more VOLTAGE, it can draw more CURRENT only. The alternator responds by supplying more current, if it cant keep up, the voltage DROPS. So a higher voltage would trace to the charging system some how.
Why does my voltage guage only show 9-10 volts?
My voltage guage usually points near the red mark at 9-10 volts. Batteries cranks the starter quickly and it does not seem to lack any electric power. Some times driving, it will raise to about 12 V, but never above, and the next minut point at 9 again.
What should the voltage be on a truck?
You want 12.4v -13v at the battery with 12.8v being ideal with the engine off. x3, load test the batteries one at a time first. Is the tach behaving nicely? or erratic?
15VDC is not unheard of, I’ve seen it with my own truck, and the previous D****. The ECM should trigger a fault code on an overcharge condition…it should be able to turn the alternator off too. Alternator Overcharging? No the battery will only loose voltage when going bad.
Just a note to those with electrical issues…an item USING power cant draw more VOLTAGE, it can draw more CURRENT only. The alternator responds by supplying more current, if it cant keep up, the voltage DROPS. So a higher voltage would trace to the charging system some how.
What causes the idle voltage on a GMC Yukon?
Items that affect the vehicle’s electrical system current and voltage at idle are the number of electrical loads being used, including add-on accessories, and extended idle times.
What makes my car voltage gauge read low?
As a vehicle slows, engine/generator RPM slows and the current (amperage) output of the generator may not be sufficient to supply the loads, the vehicle system voltage will drop and the lights will dim. Dimming of the lights is an indication that current is being pulled from the battery.