Is there a problem with the battery drain on a Cadillac?
Today my Caddy passed the battery drain test. I let it sit for 3 days without starting it or charging the battery and the engine fired right up with no issue. Therefore , the new alternator was what my truck needed.
When does an alternator go bad on a Cadillac?
If the battery voltage falls below 12.6 with the engine running then the alternator is bad.
Why does my battery drain after a few days?
So for anyone experiencing weird battery drains after the truck sits for a few days they should test the alternator for a bad rectifier. Note: Other issues like stuck seat buttons can also cause a battery drain, but it seems that a bad alternator is one of the first things to check.
What should the voltage be on a Cadillac battery?
Place the voltmeter leads on the positive and negative battery terminals with the correct polarity, and then check the voltage reading with the engine running. There should no more than .5 AC volts passing to the battery.
Today my Caddy passed the battery drain test. I let it sit for 3 days without starting it or charging the battery and the engine fired right up with no issue. Therefore , the new alternator was what my truck needed.
If the battery voltage falls below 12.6 with the engine running then the alternator is bad.
Why does my car battery drain when I turn it off?
The resultant 3.5 amp draw/load on the battery could possible discharge the battery to the point where the battery will not have sufficient amperage to start the vehicle. We’ve sent a new BCM calibration to your dealer so that your vehicle can be reprogrammed to ensure that the BCM shuts down when you turn the vehicle off.
Place the voltmeter leads on the positive and negative battery terminals with the correct polarity, and then check the voltage reading with the engine running. There should no more than .5 AC volts passing to the battery.
Where is the rectifier on a Cadillac battery?
Picture of the alternator with the rear cover and voltage regulator removed. The rectifier is the black component on the lower section of the alternator housing. You can test it by placing a red meter lead on the bolt (B+) on the left side and a black lead on the metal body for ground. Reverse to test for voltage moving in the incorrect direction.
What to do if your car battery dies from sitting?
In the event your car battery dies from sitting too long, try jump-starting your car. This will usually get your car going again if your battery and vehicle are in relatively good condition. If that doesn’t work, it’s probably time for a replacement battery. [5] Also check to see if there are any signs of a bad alternator.
Why does a car battery go dead when not in use?
[1] When your car is not in use, keeping a battery charged is difficult because the alternator doesn’t have the opportunity to do its job. The alternator is essentially a generator for your car’s electrical system.