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Unexplained battery drain


sixman

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  • Member For: 19y 8m 7d
  • Gender: Male
  • Location: Hills District, NSW

I keep getting a flat battery when not using the car for >24hrs.

No lights etc. are on.

Disconnected the battery for a few days, then reconnected and all good, so worked out the battery itself is holding charge and is ok - measured Voltage which was stable.

Checked battery draw with car locked and off for >20 mins and iam seeing a 0.53A draw.

Pulled fuses sequentially in engine bay and next in cabin, but none of the circuits identify the battery draw.

Is this a faulty alternator? Where else do I look?

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  • Member For: 11y 1m 3d
  • Gender: Male
  • Location: Frankston, 3199

Following this - similar issue - battery scans ok, have gone through 3 new ones but still have similar issues (has never been flat, but one day it doesn't start 1st try, others it does)

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  • Member For: 19y 8m 7d
  • Gender: Male
  • Location: Hills District, NSW

Its an fg mk2 xr6t.

 

Yeah, just started happening. Checked all the grounds and they are in good shape. I replaced the main ground wires about 18 months ago as they were deteriorating - turning to dust on the inside of the plastic shielding, but this issue is only happening in the last couple of months

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  • Member For: 11y 1m 3d
  • Gender: Male
  • Location: Frankston, 3199

Anything like a dash cam or anything?

 

Anything plugged into the USB in the centre console (charger works there when the car is off)

 

etc

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  • Member For: 19y 8m 7d
  • Gender: Male
  • Location: Hills District, NSW

No dashcam. I have removed my usb charger and even tried removing the fuse for it.

I thought all battery draw must go through the fuses, so puzzled I couldnt isolate the culprit circuit.

 

I have a Kayhan head unit, and there was a can bus issue related to the door lock, but they fixed that with an update. I have checked the ICC and bcm circuits and no issue there.

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  • Member For: 11y 1m 3d
  • Gender: Male
  • Location: Frankston, 3199

Did it only start after the Kayhan?

 

Have you got the original version that shuts off and needs 40 secs to start or the newer one that starts quick?

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  • Member For: 19y 8m 7d
  • Gender: Male
  • Location: Hills District, NSW

Still cant work out the cause of this parasitic battery drain.

Any recommendations for a autoelectrician in the hills district / parramatta area?

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