Question about 2000 Chevrolet Impala

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I have about a 6 amp drain on my Battery at all times and after a few weeks my battery discharges to the point it won't even click the starter. My engine light is lit up on the dash also, I had a handheld read the error and it said Fan 1 circuit. I had the error cleared and it comes back right away.Is it possible for a Fan Relay to fail causing a 6 amp drain on my battery? Or would a shorted cooling FAN itself more likly be the problem?

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  • Chevrolet Master
  • 5,332 Answers

A 6 amp draw would be enough to drain the battery overnight. are you sure its not lower?

The easiest way to find a draw is to start removing fuses one at a time until the draw goes away making sure to replace the fuse before moving onto the next so you don't end up with a pile of fuses that you don't know where they go. Once you have narrowed down the fuse that eliminates the draw you can then start to focus on all the devices that circuit powers up.

Typically you would want to see a draw of less than .050 amps and in your situation you should see less that .030 amps or even less after the draw is gone.

Post back after your find out what fuse eliminates the draw and I'll do my best to get you some more info on that circuit.

Posted on Oct 12, 2010

  • RedneckCaddy Mar 03, 2011

    Hi, I have been struggling with this problem for a few weeks and finally found the problem. History: the radio has been acking wonky and the radio power / volume button does not control the radio properly i.e. when you push the power button, the radio comes on but attempting to adjust the volume, changes the fade, balance and bass controls and furhter turning the volume, shuts the radio off. After a few dead battery mornings and recharges, I noticed that with the charger connected and the radio off, I coudl hear the unfiltered ower sound coming through the speakers. I pulled the radio / amplifier fuse and bingo, no more drain. I am reluctant to get a used radio from the wrecker as I dont know if it was the radio or the amp as the root cause. Hope this helps others. regards, Jim

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Battery won't stay charged


1. the car drain's the battery even when it is not started or the key isn't in ignicion, the car has a electrical problem, you left a light, the starter could drain it, the alternator as well, or a bad radio is draining the battery even with no key in the ignicion,
2 it's a bad battery (discharges it self by beeing counicated inside).

solucion 1. to see if the car is drainin the battery would be by disconecting a battery termina and see if discharges again, if not, then the car drain's the battery.

solucion 2. if the battery discharges even when if it's disconected from the car, then change the battery.

warning, the first cause coul'd induce to a self discharging battery. even if you changed the battery, do a litle monitoring to be sure it's not the car that is turning the battery bad. how? if you install a new battery, leave the car for a few days (i mean do not start the car) and see if the battery discharges, if so, then you have to search what is draining the battery (that could be a very costly work, time and money and complicated). or put a ''battery disconector'' so the car cannot discharge the battery.

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When a battery is very low, even a jump won't work because the battery takes too much out of the jump. Take the battery out and have it charged up.
If it won't take a charge, get a new one.
But also make sure the battery terminals and cable ends are shiny and greased.

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