Question about Chevrolet Cars & Trucks
If the battery was completely dead, then you either have an immense power drain (unlikely) or your battery or alternator are faulty.
When you say you replaced the battery. Was that with a brand new one?
Assuming your battery is fine and fully charged, then the vehicle should start.
If the vehicle starts, then check your instrument cluster for a charge warning indicator.(typical red battery sign). If this is on, then your battery is not being charged.
You can also check with a multimeter across your battery terminals when switched off. You are looking for a voltage around 12.6 volts.
With the vehicle running, run the same test across the terminals. A healthy alternator should be charging at anywhere around 14Volts.
When running, if the battery voltage is constantly dropping, then you have a faulty charging circuit.
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
not sure what the issue is as a motor, unless you are running all your accesories should run off the battery for abit.
quick test. put a completely charged battery in the vehicle. start it up.... unhook the battery.... if it dies.... alternator.... if it keeps running battery.
Posted on Sep 07, 2008
hey buddy the same that happeanto me, its your alternator dont make any one give you the run a around alternator for sure. i got my alternator from gb500 it cost about $160.00 after tax.
Posted on May 20, 2009
What is the voltage you are reading? Is it below 13.2 or so? Also have you checked the current with the engine off to see if something else is working that should not be on. I ran across this twice while working on a truck and car. A relay that was wore out keep trying to close and would drain the battery every couple of months. Sometimes you can hear them clicking or buzzing. Touching them sometimes they are warm or real hot. But that is not a sure sign it is bad. In my Trailblaze they get hot but are ok. Another thougth is the belt on your alt, correctly set to spin it at the right voltage. I have ran across this many times lately with serpatine belts.
Posted on Aug 04, 2009
Charge your battery to full charge, next if you have a test light hook up the negative cable to the battery then with the test light touch one end to the positive battery cable and one to the positive post, is the light on? if yes is it bright? if yes Check your glove box and remove the glove box light check the light again, is it still bright? then check the rear cargo lamp and see if it's on if not, remove the bulb anyway and check the light one more time. if the light is still bright disconnect the light from the positive cable and the battery and then disconnect the positive wire to the alternator once it is disconnected do the light test again. Hook light to post and to the positive cable, is the light still bright? if no It's the alternator diode trio regulator Bridge, if it's still bright hook up the alternator wire again and then with the hood up and the hood light disconnected or the bulb pulled, locate the fuse panel and remove one fuse at a time, while you watch the light be sure to have the bulb out of the dome light so it does not give you a false reading. Now pull one fuse at a time if the light goes out thats where you have a problem on that circuit, on the fuse panel lid it will have it marked as what it is you can let me know what circuit it is and I can tell you how to check that circuit or if you prefer you can go to http://www.alldatadiy.com and buy a subscription for your car and it will have all the test and wiring information you want.
If you find the alternator is the culprit it could even be the brushes have fallen out one side or the other and is shorting if the battery is fully charged take it to auto zone and they can test the alternator output, if it does not put out 13.5 to 14.5 volts and 60 or 90 amps and 900 RPMS you know the alternator is bad just buy a replacement because rebuilding your alternator would cost as much buying a new or rebuilt alternator that has had everything done to it.
Now for the check engine light while your at auto zone you can have them pull the codes for your computer and that will help give you an ideal if the two problems are related. If the battery voltage drops below 10.5 volts the check engine light will come on because the computer is detecting low voltage if you run it on low voltage for very long you may burn out the computer. Hope this helps and thanks for using fix-ya
Posted on Jan 17, 2010
Testimonial: "Thanks for taking the time and all the great advise. I changed the alt. and have had no problems thus far. "
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