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Battery Draining

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New User

Dec 23, 2022, 7:47 PM

Post #1 of 2 (252 views)
Battery Draining Sign In

Hope ever one is well. Have a 2004 Chevy Impala 3.4L V6. The car won’t start in the mornings, have to jump it to start. I have checked to make sure nothing is left on and there is a new battery in. Battery terminals appear to be clean and tight.

Any ideas or suggestions?



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 23, 2022, 8:32 PM

Post #2 of 2 (242 views)
Re: Battery Draining Sign In

There is a procedure for finding a battery draw like that.

You will need a digital ammeter and a jumper wire with clips on the ends to do this.
First rig any door switches so you can have a door open without triggering the interior lights and unplug the hood light. Remove one battery cable and attach the meter in series between the battery cable and battery post. Take the jumper wire and also attach it the same way. Leave the jumper wire on for at least 30 to 40 minutes to expire all the automatic timers. Now remove the jumper wire and read the meter. Anything over 50ma is too much draw. The way you locate this is to start removing fuses one at a time until the meter drops to normal level. This will be the circuit with something staying on. Determine what components are part of that circuit and check them individually until the problem is isolated.
Note that the act of pulling fuses will often restart some timers so you may have to wait for them to expire if that happens


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