Question about Cars & Trucks
Posted by Anonymous on
Just a word of warning about batteries. A battery produces two gases when it is charging, oxygen and hydrogen which can be a very explosive combination in the confined space above the electrolyte. The sharp shards of plastic shrapnel that a battery case becomes if it does explode can fly a long way and the spray of acid can ruin a set of clothes or eyes.
Even though your battery might not be charging there could be gas hanging around so blow or fan across the battery to disperse it before doing anything that might create a spark. If you can remove the cell caps first and then blow or fan across the top.
On some vehicles the battery light coming on is an indication the drive belt has become slack or has broken, the generator or alternator has failed or there is something wrong with the wiring.
If the light has come on because the belt has gone and the belt also happens to drive the water pump and cooling fan it would be foolish to drive the car until it is repaired.
Posted on Apr 20, 2015
Usually this is a sign that it is not charging correctly. First check the battery posts. Corrosion will make the light come on for sure. Water level in battery? Go to an auto parts store after cleaning the posts and checking water level (if you can, do not get acid on ya either or over fill it). Then they can tell if the unit is charging correctly by simply putting on a volt meter across the posts. Good Luck.
Posted on Apr 20, 2015
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Posted on Jan 02, 2017
SOURCE: 1991 ford ranger battery light
bad battery module for the light or a dieing cell in battery
batterys can be tested and wont show a dead cell at all but you will be told that the battery good
most batterys are refurbished batterys sometimes getting the luck of a good battery is 50/50 chance
heres a way to test the battery and alternator at the same time
disconnect battery positive post
if vehicle dies the alternator is at fault if vehicle doesnt die its the batterys life dead cell
Posted on Jun 11, 2008
Could be anything from corrosion on cables, loose cables, lose or faulty wiring of wires behind alternator
defective voltage regulator. Visually inspect all the items noted. Then use a volt meter and measure the charging voltage of the alternator. It must be between 13,5 to 14.5 volts with and without accessories on at idle and 2000rpm. Anything below 13.5 weak battery or defective alternator ,lose wiring , corrosion. Anything above the 14.5 volts is a defective regulator.
Posted on Jul 06, 2010
SOURCE: Battery warning low charge on
With the low charge indicator on it would be the alternator not doing its job correctly. You can take the alternator and the battery to a local auto parts store and they can run a test on both and charge the battery to see if the battery is leaking down or if the alternator is not charging correctly.
Posted on May 29, 2011
You would have checked the charging system before replacing the alternator, so I will assume the charging system is good.
If the battery is being discharged overnight or over a few days, you would need to disconnect it and check every circuit on the truck to find the drain.
Posted on Oct 11, 2012
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