Question about 2003 Chevrolet Silverado 1500
Unit has a slow drain on battery. drains faster in colder weather. new battery last year, new alternator this year.
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Posted on Jan 02, 2017
SOURCE: Chevy Malibu Check Battery Light
The battery light in my 1998 malibu just came on the other day. The serpentine belt lookd new... The car starts right up.... Can I ignore this light?
Posted on Feb 11, 2009
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.
Posted on Mar 05, 2009
, do a simple test on the charging system...check battery voltage. should be 12v or better. start engine & check volts at idle, no accessories on. volts should read 13.5 -14v. Turn on all accessories(including headlamps on high) volts should drop slightly but should not creep down. Definitely not below 12.5. If voltage drops lower than 12.5, the regulator (in the alternator) is not working. either change regulator or change entire alternator. Alternator drive belt should have sufficient tension so that alternator cannot be turned easily by hand. If it can, check belt tensioner.
Posted on Mar 18, 2009
the problem with your car is: a battery "leak" to ground (like leaving the dome light on all night)
The way to fix this is: buy a testlight at an autoparts store it will look like an ice pick with a bulb inside, then: with your battery fully charged remove the black (-) negative battery cable and connext the testlight between the cable and, the battery post (clamp
to cable end then:spike to post make sure they dion't touch the car's metal parts now make sure all the accessories are off and,all doors closed etc.next pull fuses until the testlight goes off you have then found your problem area, replace the fuse that you removed and, look in your owner's manual and, identify what electric devices are on that fuse's circuit i.e. glovebox lamp, trunk lamp, lighter; etc. then just remove each item from the circuit until the testlight goes off this is will have been your problem remember that a bad lamp does not need to glow to be "on" also any tiny vs. bright glow on the testlight will indicate by how much the problem device is draining your battery
Posted on Apr 26, 2009
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