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Tinman

Member Since: 22 Mar 2017
Location: kent
Posts: 1188

2017 Range Rover Autobiography SDV8 Silicon Silver

Another battery drain

I have a friend that has a 2007 3.6 tdv8 and he has a battery drain after locking, its 9.79 and after 20min its 0.31 and holding I have done some searching on other threads and we have pulled fuses but still not found it yet? 2017 SDV8 4.4 silicon silver AB
2012 TDV8 4.4 Stornaway Grey AB
2011 TDV8 4.4 Buckingham Blue
2012 VW V6 3.0 Tougreg

21st Jan 2023 11:27am

Tinman

Member Since: 22 Mar 2017
Location: kent
Posts: 1188

So after 1 hour it is at 60ma any suggestions? 2017 SDV8 4.4 silicon silver AB
2012 TDV8 4.4 Stornaway Grey AB
2011 TDV8 4.4 Buckingham Blue
2012 VW V6 3.0 Tougreg

21st Jan 2023 12:33pm

Phoenix

Member Since: 16 May 2022
Location: Gone
Posts: 1631

60mA is going to be a pain to find as in reality you're looking for 20mA or so, what are you measuring it with? Can you isolate it to front or rear fuse box (measure at the supply to the rear, if it's not there then it has to be the front) I wouldn't recommend pulling fuses as that can wake up other circuits if it causes a loss of communication between modules.

21st Jan 2023 12:52pm

Tinman

Member Since: 22 Mar 2017
Location: kent
Posts: 1188

Phoenix, thanks, I'm using a Fluke multi meter and will have to do some more digging. 2017 SDV8 4.4 silicon silver AB
2012 TDV8 4.4 Stornaway Grey AB
2011 TDV8 4.4 Buckingham Blue
2012 VW V6 3.0 Tougreg

21st Jan 2023 1:41pm

KristoffL322

Member Since: 20 Jun 2022
Location: North West
Posts: 27

2012 Range Rover Westminster 4.4 V8 Orkney Grey

I'd advise getting a low amp clamp meter for your fluke, then you can clamp it round each of the cables coming off the battery, whilst its still connected. That will narrow it down to which fuse box you need to check. With a 60ma draw, you will most likey have to use the millivolt votage drop testing method, leaving the fuses in as you check, rather than pulling fuses and looking for the amp draw to drop on the clamp meter, as pulling the fuse may well disturb your readings with such a small current draw.

23rd Jan 2023 6:46pm

Joe90

Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6408

I would start with all the sound and vision kit in the rear cubby. Completely disconnect each device (one at a time) and test the drain. Start with the Nav DVD first, most likely culprit. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

23rd Jan 2023 9:42pm

Phoenix

Member Since: 16 May 2022
Location: Gone
Posts: 1631

Tinman wrote:
Phoenix, thanks, I'm using a Fluke multi meter and will have to do some more digging.

Sorry, should have been more explicit - I meant clamp or direct measurement, clamps are fine for >0.5A (500mA) but suffer from drift on DC unless you invest a lot of money, for your issue, clearly direct measurement is best but be careful with pulling fuses as this can cause a spike in current draw which will blow the fuse in your meter.... As mentioned above, using mV measurement across fuses will be the best method in your case, there are tables available but make sure you're using the right one as they differ for the type of fuse in use.

23rd Jan 2023 9:53pm

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