What to do if your GMC Sierra has a bad alternator?
With your Sierra turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire.
How to change the battery on a GMC Sierra?
Install the battery cable (positive), remove the large alternator wire. Remove the the small positive wire that comes off the battery and goes to the fuse block. Remove it at the fuse block and put your meter inbetween the fuse block and that small wire from the battery.
What happens when an alternator has an electrical problem?
After the engine starts (thanks to the high voltage provided by the battery), the alternator provides the electricity required to power the car’s many electrical functions, including the lights and radio, the spark, charging the battery, and others. What Happens When Your Car Has an Electrical Problem?
Can a Saab 92 start with a bad alternator?
Dual ignition coils (the blue cylinders at the top of the picture) on a Saab 92. Before you go out and order a new battery or alternator, test some of these different systems. If your alternator, coil, battery, or starter is bad, the car probably won’t start, and it definitely won’t be drivable.
With your Sierra turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire.
Install the battery cable (positive), remove the large alternator wire. Remove the the small positive wire that comes off the battery and goes to the fuse block. Remove it at the fuse block and put your meter inbetween the fuse block and that small wire from the battery.
What are the symptoms of a bad alternator?
Outside of the battery warning light, a dead battery is the most common symptom of a bad alternator. As the alternator can no longer supply your Sierra with an adequate power supply, it will begin to feed off of the reserve in the battery.
Why does the battery light come on after the alternator is replaced?
This would make the Battery Light come on. It is also possible that there is a problem with the fusible link or the alternator fuse for the charging system.