Question about 1992 Cadillac DeVille
I cant figure it out and dont wanna pay all the money to do it i have a 97 cadillac seville and the old blower motor was broke and something keeps killin the battery i put a new one on and it still isnt working and battery wont keep a charge PLEASE HELP
There are three main possibilities:
One is that your battery might not be making a good connection somewhere, like a bad ground or corrosion at one the cable ends, positive or negative. A bad connection will prevent the battery from ever charging fully.
Also make sure no connections are loose.
Another possibility is that you may have a light or other accessory stuck "on" after you leave the car, like a trunk light, etc.
The third possibility is that there is a short somewhere in the electrical system, in the form of a bare wire or malfunction of some accessory which is draining the battery. Sometimes this can be very difficult or time consuming for us non-mechanics to figure out.
If you still have trouble after the battery and connections check out okay, it's probably a good idea to have a mechanic isolate the problem.
On a side note, Caddies have a lot of power accessories so it's good to take them for a good highway drive once in a while to let the alternator fully maintain the battery. Use a battery charger to charge if the battery is really low. The alternator is really used for maintaining a charge, not charging. Using the alternator repeatedly for heavy charging will eventually cause your alternator (expensive) to overheat and fail prematurely.
You may want to check the output of the alternator with a voltage meter. While running, the voltage at the battery should be about 13 -14.7 volts. While the car is off, the battery should be about 12.6 volts but no lower than 12. This may vary a little with the outdoor temperature.
Make sure the water level in the battery is correct -- always use protective eye wear and use extreme caution any time you work around a battery.
A good local mechanic won't charge much to do a basic check up of your charging system and this might be well worth it. He can also verify in fact if the battery is being discharged and how much.
If there is a short somewhere, he is probably your best choice for diagnosing and fixing that.
Posted on Feb 03, 2009
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