Question about Pontiac Bonneville

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Battery goes dead overnight unless you take battery cable off

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  • Expert
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I would try unhooking the alternator for a night. have you added an aftermarket radio? security system? something plugged into your cig lighter? dome light on? brake lights on?

Posted on Nov 05, 2010

Testimonial: "thanks ill try unhooking the altenator"

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  • Pontiac Master
  • 8,589 Answers

Please see my tip at http://www.fixya.com/cars/r5925550-dead_battery_troubleshooting . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Nov 05, 2010

Testimonial: "thanks very helpfull "

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mkv0525
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SOURCE: 99 mercy sable theft light keeps binking battery goes dead

you have a bad cell in your battery or a major draw on electric system. I would have the battery tested first.

Posted on May 27, 2009

wilsodfarm
  • 986 Answers

SOURCE: battery goes dead overnight on four occasions

I dont think the dealer knew what he was doing ,your altenator has 6 diodes inside it and the are a one way check valve for current,If one fails no light will come on because it is still charging,But will drain your battery,I hope this helps you and have a merry x mas and please dont forget to vote on this solution

Posted on Dec 19, 2009

  • 286 Answers

SOURCE: 1997 ford escort battery new battery dead overnight no electrical works no blown fuses jump start and cables start to melt will push start and run

Check battery cables are correct ! Prime suspect here ! Alternator may be damaged and shorting .. Don't drive any car that will melt jumper cables ! Something very basic wrong here.

Posted on Aug 26, 2012

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3 Answers

Dead battery even when 2001pt,cruiser is not runing


You haven't given a lot of information to go on and I don't really get what you mean when you say the battery is dead even when the engine isn't running.

Have you had the battery tested? Most any parts store or repair shop can test a battery for you and tell you if it's good, bad, or just needs charging.

If the battery checks out okay poor connections at your battery could be the problem or the cables themselves could be so corroded that they no longer are capable of flowing current. If there is corrosion on your battery terminals that is a place to start. Use baking soda and water to clean the clamps and posts (you'll want to remove them for this), also a wire brush for tough spots.

Does the battery go dead after a few days or overnight? If after a few hours or overnight then something is most likely draining the battery. Do you have to jump start your car after it sits for a few hours? If so then look for dome or glove or trunk lights being left on, brake lights sticking on, aftermarket stereo or alarm wiring issues, or other items staying on after the car is turned off that would drain the battery. Bad door or trunk switches for the dome lights can cause the lights to stay on.

You can test for ignition off draw with the right testers to see if it's within specs. You could also pull the IOD fuse in the block under the hood to see if that stops the battery from going dead overnight.

If it goes dead over the course of several days then a more likely suspect might be the charging system.

But these are all just general ideas. We need more specific information to really hone in on any one area. But the first thing to do is get that battery checked and given a clean bill of health.

Jun 18, 2014 | 2001 Chrysler PT Cruiser

1 Answer

Battery keeps going dead overnight. I've already changed the alternator which tested to be bad and still having the same problem


if you installed a new battery as well as a new alternator, it should not go dead overnight. if you have a short in the vehicle that will drain a new battery that rapidly, the cable would have been melted already. although, dome lights do have a tendency to drain batteries, but not overnight. use a multimeter to check the battery voltage while the motor is running. it should read above 13 volts DC signifying that the alternator is indeed charging the battery.

Oct 26, 2013 | 2006 Hyundai Tucson

1 Answer

I have a 99 ford expedition eb ive had the battery n alternator tested both reading at the right volts but the battery keeps dying.... ive made sure every thing was tight n where they should be n...


If the alternator is charging the battery, and it goes dead overnight, you have a short to ground in the wiring that is draining the battery.
You can try disconnecting the negative battery cable and see if the battery stays charged when the engine is off.
If it still goes dead, the battery could have a dead cell.

Sep 23, 2013 | 2005 Ford Expedition

1 Answer

BATTERY GO DEAD OVERNIGHT ON A 1984 PONTIAC FIERO


If your fan isn't running it shouldn't be drawing electrical current, but this procedure should narrow down the cause:

The positive battery cable goes to the starter and a couple fusible links feed the fuse block from there. I recommend hooking up an ammeter inline with the negative battery cable and pulling fuses until you find the one that stops drawing current on the ammeter when you pull it. At that point you will have found the circuit that your battery killer is on. Look at a wiring diagram for your car and see what devices are on the guilty circuit. Look and see if those devices are on/broken/shorted.

Common causes of "overnight dead battery" are: courtesy/trunk light on with doors/hood/trunk closed/sticky power door lock solenoid/aftermarket equipment installed to constant power instead of keyed power.

Good luck,

Rebel Faggioli

Apr 05, 2013 | 1986 Pontiac Fiero

1 Answer

07 Honda Ridgeline Battery goes dead overnight - new battery


Thats probably your current drain.
See if you can find the relay and what it controls.
Pull it out and see if the current drain stops by using a test light between the battery and one of the cables.

Mar 06, 2013 | Cars & Trucks

1 Answer

Battery drain on 1995 buick lesabre, where do you start to find it


Disconnect the red battery cable.Take a test light and hook 1end to the + batt post and the other end to the +batt cable. This will make the test light illuminate. Pull 1 fuse at a time until the light turns off. This will pin point the electrical circuit that has "parasitic draw". (be sure to reinstall each fuse that has no change)

Dec 26, 2012 | 1995 Buick LeSabre

1 Answer

Changed the alternator and car still going dead overnight


remove the negative battery cable place a test light between the cable and the battery if the light is on bright you have a draw remove fuses until the light goes dim then trace that fuse to the draw also disconnect the alternator as well as a bad diode can draw the battery as well when its off

Sep 26, 2012 | 1995 Nissan Maxima

1 Answer

BATTERY IS GOOD SO IS THE STARTER AND THE ALTENATOR WHY DO I KEEP HAVING TO HAVE JUMP STARTS? 1997 FORD ESCORT


How long does it take for the battery to go dead, overnight, couple of days?

Have you checked the electrical system for draws? You'll need a multi meter capable of reading amperage. Disconnect the positive cable and hook the meter up in series with the battery and the positive cable. You want to make sure the key is out of the ignition, all the doors are closed and all the dome lights etc are turned off before doing this. If you get a reading of more than .050 amps than you have a draw. You may have to wait for 20 minutes or so for everything to power down to get an accurate reading.

If you have a draw of more than .050 amps than you can start pulling fuses one at a time until the draw goes away and then focus on the things that fuse supplies power to. Make sure you put the fuse back that you pulled out before pulling the next.

If there are no draws and the battery goes dead overnight disconnect the battery, let it sit overnight and then see if the battery will start the vehicle in the morning. Every once in a while you will run into a battery that has an internal draw and will run itself down all by itself.

Sep 27, 2010 | 1997 Ford Escort

1 Answer

Ocassionally i have to re-charge my battery as my Caliber does not start - it only happens randomly, appparently without a valid reason.....i did not start the car for aprx. 24 hours, and it did not...


1st ensure the battery terminals are not corroded and tight if you disconnect the positive terminal to the battery and connect a test light one end to the battery and the other end to the cable it should light up meaning a draw is present then remove one by one the fuses until the light goes out and read what the fuse goes to ..usually a glove-box or a door switch even the trunk light is not getting the proper connection to close the circuit to cause overnight or day to drain the battery ..unless you have a dead cell in the battery itself or the alternator is not charging properly .

Sep 21, 2009 | Dodge Caliber Cars & Trucks

1 Answer

99 mercy sable theft light keeps binking battery goes dead


you have a bad cell in your battery or a major draw on electric system. I would have the battery tested first.

May 26, 2009 | 2001 Lexus Gs 300

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