Disco 4 Dual battery issues - Battery drain

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Originally Posted by ian4002000

The Ctek bluetooth battery monitors will use quite a bit of power.

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That quite interesting, and idea of their power consumption?

I only use the BM2 Bluetooth Battery Monitors and they claim a power usage of just 1ma.

I have not bothered to test this out.

Quote:

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Originally Posted by drivesafe

That quite interesting, and idea of their power consumption?

I only use the BM2 Bluetooth Battery Monitors and they claim a power usage of just 1ma.

I have not bothered to test this out.

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Just found this but doesn't help much.

Attachment 161772

Quote:

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Originally Posted by drivesafe

That quite interesting, and idea of their power consumption?

I only use the BM2 Bluetooth Battery Monitors and they claim a power usage of just 1ma.

I have not bothered to test this out.

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According to Ctek specs less than 1mA @12.5V

https://www.ctek.com/storage/BBB54B7...-low-UK-EN.pdf

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Originally Posted by Aussie Jeepster

Just found this but doesn't help much.

Attachment 161772

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Solves the issue... line 4 of the spec - hardly a dent.

I found something on the net that said 1ah over a month.

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I've attached a screen shot of fuses I checked yesterday to check for high current draw. Hoping I'm doing this right. I couldn't reach the lower dozen odd fuses in the bottom of the glove box because of my bad back. Also tested the ones in the engine bay. They were tested with the vehicle off, unlocked and the passenger door and bonnet opened.

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Not sure just how you are testing the fuses, but the following may help:

https://static1.squarespace.com/static/582b77aa6a4963c3f199b0a5/t/5989d6f3d482e9b676e942b5/1502205684108/Fuse_Voltage_Drop_Chart_-_Standard_Fuse.pdf

https://us.autologic.com/news/testing-parasitic-draw-via-fuse-voltage-drop

You cannot be showing 10 amps across a blown fuse.

Hi Old Farang.

I wasn't showing 10amp across the old fuse.

The fuse is a 10amp and was blown.

The other tests show the amperage showing through the meter.

Thanks.

Is anyone on the forum able to advise if the draw through the fuses is normal please? Any advice regarding finding what's causing the batteries to go flat would be appreciated.

Thanks.

Quote:

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Originally Posted by Tommy Armstrong

Hi Old Farang.

I wasn't showing 10amp across the old fuse.

The fuse is a 10amp and was blown.

The other tests show the amperage showing through the meter.

Thanks.

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On the screen shot that you posted you have shown all the readings in mV (millivolts). To be able to read ANY current draw (amps) your test instrument HAS to be in series with whatever circuit that you are trying to read. If you read the mV "drop" ACROSS the fuse while it is still in the circuit, then you need to cross reference whatever reading that you have with the charts that I posted.

It is possible to use a "clip on" ammeter around the wire you are trying to monitor, but it needs to be a good quality meter to accurately read milliamps.

Quote:

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Originally Posted by Old Farang

Not sure just how you are testing the fuses, but the following may help:

https://static1.squarespace.com/static/582b77aa6a4963c3f199b0a5/t/5989d6f3d482e9b676e942b5/1502205684108/Fuse_Voltage_Drop_Chart_-_Standard_Fuse.pdf

https://us.autologic.com/news/testing-parasitic-draw-via-fuse-voltage-drop

You cannot be showing 10 amps across a blown fuse.

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Hi Old Farang,
Thanks for the info.
It will help me in my investigation.
Regards
GIL