Question about 2006 Chevrolet Impala

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My car will not start, Jump the battery it starts and is good for the rest of the day. Next day car may or may not start. There has been 2 batteries put on car this year. last battery was installed by dealership. Alternator has been replaced. Starter and alternator have been checked and are fine. What could possibly be draining the battery. Again this happens after car has sat overnight. May happen a few days in a row or may go a month with out happening.

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  • s_hyte Sep 14, 2010

    You had to check clock. I have something to add to situation. last year a water pump was put on car. Now I have to turn radio on and off. For example, usually when you turn a car off and restart it radio will automatically come on if it was not turned off, but that does not happen. also the clock will not work. The time appears but it stays stuck on 12:00. After you set clock it does not move.

  • s_hyte Sep 14, 2010

    Car will not start in morning after sitting for aproximately 8 to 10 hours overnight. This does not occur daily. after jumping the battebery when car won't start the car starts fine the rest of the day. The car not starting may happen 2 or 3 days in a row or it may be a month or more before it occurs. Had a water pump put on last year and after that the radio would not come on automatically after turning the car off and clock will not work. The radio has to be turned on every time car is started. Have set clock time and it will not move.

  • s_hyte Sep 14, 2010

    Why the car start for days and then not start for days. The problem with the radio and clock occurred after water pump was installed, is there a conncection. The problem with the battery started about 6 months ago but the radio and clock started after water pump approx. year ago.

  • s_hyte Sep 14, 2010

    I have not heard a click. Sometimes when I try to start the car it will not do anything, then another time it will try to crank, usually when that happens once I try to jump it it starts. I have had to leave the jumper cables on for a few minutes to get it to start. I have also been asked do the lights come on when I try to jump it and they do come on. I did have battery tested and one person said the battery was bad, another person said it is okay but does not seem to be charging fully. The last battery I had put on was in March or April. There was one battery put on at the dealership and it didn't work within a month back at the dealership and they said the 1st battery was no good and then they put this 2nd battery on. dealership put on machine and they kept saying it was the battery

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3 Answers

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  • Chevrolet Master
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I need you to clarify what happens when it won't start, does the engine crank over but not fire up or does if not crank at all, if the starter doesn't crank the engine over do u hear any kind of click from under the hood? this is very important, u may have burned solenoid contacts in the starter, this is the symptom, clicking but engine will not crank over,if this is the case replace the starter solenoid even if it tested ok, trust me have done dozens of these.

Posted on Sep 14, 2010

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  • yadayada
    yadayada Sep 14, 2010

    please read my questions again and answer them, u did not answer even one thing i asked, please help me to help u, u can also call me if u are confused about what i am asking, 925-577-7157

  • s_hyte Sep 14, 2010

    Thanks for your help

  • s_hyte Sep 14, 2010

    Thanks for your help

  • s_hyte Sep 14, 2010

    Thanks for your help

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  • Chevrolet Master
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When your car battery goes dead overnight, usually either the battery is at the end of its life span, or you left something on, such as a light. Occasionally something is drawing power that’s not of your doing. This is a parasitic draw, and it can cause the same result as leaving the headlights on: a dead battery in the morning.

1. Remove the negative side battery cable from the negative battery terminal.
2. Connect the black wire to the com input on the multimeter and the red wire to the 10A or 20A input on the multimeter. the meter needs to be able to read at least a 2 or 3 amps for this test to work. so connecting the red wire to the mA input on the multimeter wont work.
3. Attach an multimeter(set the dial on the multimeter to measure Amps as per multimeters instructions) between the negative cable and the negative battery post. Wait a few seconds to several minutes for the car to go into sleep mode - i.e. when you make the contact with the ammeter, the cars computer systems "wake up". After a bit of time they will go back to "sleep".
4. If the ammeter is reading over 25-50 milliamps, something is using too much battery power.
5. Go to the fuse panel(s) and remove fuses, one at a time. Pull the main fuses (higher amp ratings)last. Be sure to observe the ammeter after pulling each fuse.
6. Watch for the ammeter to drop to acceptable drain. The fuse that reduces the drain is the draw. Consult the owners' manual or service manual to find what circuits are on that fuse.
7. Check each device (circuit) on that fuse. Stop each lamp, heater, etc. to find the drain.
8. Repeat steps 1&2 to test your repair. The ammeter will tell you exact numbers.


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Posted on Sep 14, 2010

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  • Chevrolet Master
  • 17,129 Answers

This is a typical case of a residual drain on the battery caused by electronics circuits that are idling in the battery power throughout.
So the first option will be to check for
1. Clock
2.Timer delay roof lamps
3.Auto winders/remote lock units.
4.car audio/video
5.car amplifiers( one mains is connected to power always)
6.Any other accessoires.
Now we need to check one by one with an ammeter in series to the battery for the drain currrent.
There can be a drain of only a few milli amps but a larger drain can cause the battery to drain off fully.
Also check if the rectifier/regulator unit for the alternator( electronic regulator) is faulty as it can drain if the recitifer develops a short/leak.
Finally if there is any leak inthe harness wiring., brake lamp circuit must be checked.
If one by one the fuse is removed the drain current can be identified to confirm the largest drain. disable and check the battery overnight.
You will be able to confirm the culprit circuit to rectify the fault.

Posted on Sep 14, 2010

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