New battery and alt. Drains if running, not running, driving, or parked. Getting frustrated.
Have the charging system checked. Maybe the new alternator isn't charging. Is your battery light on when running? If you put a voltmeter across the battery terminals when engine is running, you will know if alternator is working or not. You first should have the battery charged up. Voltage should read at least 13.5 volts, engine idling. If you just get battery voltage, say 12.6 volts, alternator is not working:. Check all battery and alternator connections for a clean, tight connection. Battery cables and connections should be inspected. Check for any blown fuses, your truck may have fusible links- if any are bad, you need to replace them. They would be located close to the battery, as they serve as power distributors.
Good luck.
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: parking lights flash drains battery on security system
mine was doing that and it was cause of a relay in the fuse box under the hood got moisture in it and was shorting out i caught it flashing the lights once and sounding the horn like it was hoarse replaced the relay like 4.95 at autozone and it fixed the problem
SOURCE: electric fans runs after car is shut off, drains battery
Having the fan run on for a bit after the engine has stopped is not abnormal in itself, but 20 minutes sounds excessive.
If the fan does eventually shut off, I'd consider changing the thermoswitch (this is a sensor screwed into the radiator somewhere near the bottom, with a pair of wires connected to it - to change it, you'll need to drain the cooling system).
If the fan stays on continuously until the battery is completely flat, see what happens when you unplug the wires from the thermoswitch. If this stops the fan, you need to replace the thermoswitch. If it doesn't, then you need to examine the wiring associated with the switch and the fan, looking for damaged insulation.
A.
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: 2003 BMW X5 fan runs after engine is off, drains battery
if you mean the interior fan
replace fan control resistor driver side footwell in climate housing
you didnt blow EB17 main fuse that kills all .
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