Question about 1997 Chevrolet C2500

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My battery light came on while driving. In the manual it is short and sweet...says could be charging device problem. Battery is less that six months old. What is the range of possible problems

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The most likely problem is your alternator, but you can check with a volt meter to ensure that is your problem. Start your truck (use a battery charger or jump to start it if you need to) and put your meter on the battery post's. If your reading 13volts or so your alternator is working and maintaing voltage, however if your reading starts dropping to 10 or less(may take a few moments to drop) then it's probably your alternator. You can also check your battery's voltage before starting your vechile, if the voltage increases after you start the vechile then it seem to be charging.

Here's a start for you, hope this helps

Posted on Jun 26, 2008

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The battery light signifies the battery is not being charged. you either have a transient fault with the alternator, or rectifier circuit, or number one suspect is that the belt that drives the alternator is slipping for a mile, warms up and then grips. Look at the belt when the light is on and see if it looks like it is slipping. You can buy cans of belt conditioner spray that help the belt to grip.

Also make sure the battery connections are tight.

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If the battery light comes on while your are driving than the alternator is not charging. The battery light comes on to tell you there is a problem with the charging system not the battery. It is normal for the light to come on when you turn the key to the run position and then it should go out shortly after the engine starts. When the light is on check the voltage at the battery if you have less than 13 volts the alternator is not charging.

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I was driving home and the car just stop, the break light came on and the battery light came on as well, i tryed to boost it still wont turn over would it be the alternator ?


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Try your alternator check it with a volt meter to see if it is charging the battery. Check the wiring make sure there is no wires of or lose or broken.

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I got a new alternator and Die Hard Gold battery about six months ago,and now my car says battery not charging,but sometimes it goes off and the battery is charging up.Yesterday while driving the car went...


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Relax, the charger is working fine. What it is doing is charging the battery to 15.5V. During this time, the "charge complete" LED is off, and the current meter shows the needle going to the right. When 15.5 volts is reached, the current is shut off, the needle goes back to the left, and the LED goes on. When the battery voltage drops to 13 volts, the current goes on again, etc. At the beginning, with a very depleted battery, the needle will be towards the right, then as the battery gets charged close to full capacity, the needle will bounce back and forth because the charger is feeding current in short pulses. Towards the very end of charging, the needle will stay longer and longer at the left end (the LED will be ON), and spend less and less time to the right (LED will be ON for longer periods, and "blink" OFF less and less). Finally, at full charge, the LED will stay ON, the needle won't make excursions to the right, etc.

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No this is not safe to continue to operate. The computer in these vehicles generally requires about 10 volts to operate as they should.

Under powering them can spike them and cost you an ECM.

This constant draw on your battery is also not good for it. After about 4-5 cycles of charging and driving you will find the battery coming back for more; less and less. Automotive batteries are not designed to withstand complete drain and repeat charging like deep cycle batteries and will fail in a short period of time in these drain/recharge cycles.

I would not operate this vehicle under anything less than an emergency situation.

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