Power drains
Your going to need a volt/ohm meter for testing this prob. You need to put the meter on amperage mode and turn off all devices in car and close all doors and make sure key is off! Disconnect the negative battery cable and use the meter to hook from the battery negative cable to the other end of the cable, basically the meter is completing the circuit. Once you turn the meter on the vehicle will have to power down cause your meter connection will have woke up several modules, wait bout 5 min with the meter on, if the meter is 10 ohm scale a good reading should be around 0.025 to 0.001, if it's anything higher then pull fuses 1 by 1 until the draw falls into proper range, that will help you narrow down what circuit the draw is related to. Quick check, make sure the trunk light and or glove box lights are actually turning off, most common prob for current draw..
SOURCE: electrical problem
there was a short in the wiring harness which was grounding out the altenator so i put in a new wiring harness and it works just fine now
SOURCE: Battery drain from power door locks on 96 Grand Cherokee
The Module in the Drivers Door is notorius for this problem. I would start by changing that first. Good luck to you. Thanks for using fixya!
-JC
SOURCE: 1998 Corvette drains the battery in less than 2 days.
No, corrosion will not cause a battery to drain, even if the corrosion is on the terminals. Several factors can cause battery drain, I would first have the battery tested to see if the battery it self is not bad. If the battery is good, then the most common is a short. All most all new cars have a certain amount of drain,(measured in milivolts) this drain is for clocks and computer memory's, and it would take several days of a vehicle sitting for the battery to be drained. Don't immediately assume you have a problem if you see 2-6 milivolts of drain on a battery with the key out, now if your battery is being drained after being parked over night, you have a problem. The easiest way to pin down the problem short is to disconnect your positive battery cable from the battery, take a 12 volt test light and clamp one end to the positive cable, and hold the probe to the positive post. Now if you have a short the light will come on. Have someone help you by pulling the fuses one at a time. If when a fuse is pulled the light goes out you have isolated the short to that system. If you pulled all the fuses and the light never went out try disconnecting all the wires from the alternator, 9 times outta 10 do this will let you know where your short is. If the system is not critical like power locks some people just leave the fuse out.
SOURCE: battery keeps draining new battery and alternaltor
Sounds like an alternator. When it goes bad, your car is forced to run off of the battery , which wont last long depending on what all you have running .
The alternator keeps your battery charged after your car starts.
Try replacing the alternator and let me know if you have any more problems.
SOURCE: My new battery keeps draining. Battery has been
Either the battery is not charging (alternator, regulator) or you have short circuit somewhere. I haven't seen a Volvo tho, so might be a generic problem. Wait a bit before messing with all the wires, it is pretty annoying and time-consuming.
you didnt blow EB17 main fuse that kills all .
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