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I Changed battery and alternator on my truck. My truck ran great for a day and now the battery is dead. what would make a new battery drain when the alternator is new along with the battery?
Wiki User
∙ 14y ago
I suspect that the same thing that caused the "old" battery drain, and/or failure to charge is causing the battery to be discharged after your replacement of the battery and alternator.
Without doing a "hands on" troubleshooting of the charging circuit, and all the circuits of your vehicle, no one can tell you the exact defect or cause. There could be one or more of many causes.
The proper "fix" for this problem is for someone who KNOWS what he/she is doing [a qualified Electronic or Electrical Technician to do a complete troubleshoot of the vehicle's electrical systems.
During that analysis, the defect should be identified and properly repaired. There are many possible causes that make this analysis is an absolute necessity.
Wiki User
∙ 14y ago
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Could alternator drain battery when car is not running?
If the alternator is installed incorrectly, yes, it can drain the battery.
Will a dead alternator drain a battery?
Yes. If the alternator is dead and you drive the vehicle, all the power is coming from the battery and it will eventually drain completely. Also, if a diode is shorted inside the alternator, that can drain a battery.
Can a bad alternator drain a good battery?
It doesn't actually drain the battery, but without a working alternator to recharge the battery it will only discharge as the car is operated.
Why wont your battery light go off when you changed your alternator and battery in your 99 mercury cougar?
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Will a bad alternator drain a battery?
Yes
1991 Eagle Talon What makes it drain the battery when the alternator is brand new and so is the batteryWhat makes it drain the battery when the alternator is brand new and so is the battery?
it reg=charges
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It can put out too many volts and destroy the battery but not drain it. The alternator should put out between 13.5 to 16 volts.
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How can tell if the battery is bad or the alternator?
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The new battery on your 1988 Cadillac Seville keeps losing it volts and stalling the carWhy?
It could be two things. As you know, the alternator charges the battery so it will not drain. If the alternator is not working properly to charge the battery, the battery will continuously drain. Have the alternator tested at your local Auto Parts store (NAPA or Advance Auto) If it is good, have the battery checked.
