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Battery drain help
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Downsman
 


Member Since: 04 Sep 2017
Location: Sussex
Posts: 87

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Montalcino RedDiscovery 3

You get a long section of 16mm black battery cable with the T-Max kit, enough to install the kit provided you don't mind using black for both +ve and -ve leads.

You also get an LED battery indicator for inside the car, which has a button to manually link the batteries in case you need to crank from the 2nd etc.
 2007 Discovery 3 HSE
1986 Land Rover 90 Ex-MOD

1996 discovery 1 v8 (gone) 
 
Post #18667729th Oct 2017 10:37 pm
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Lost for Words
 


Member Since: 03 Sep 2013
Location: Warminster, Wiltshire
Posts: 6375

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

With failing diodes, the alternator could still output a healthy voltage. Check for alternating current - directly at the alternator if possible. Over 0.5V is bad news. Thumbs Up
 Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off Sad )
Disco 3 06 reg B7S Manual Rimini Red Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped Very Happy
Several Discovery 300 TDis
 
 
Post #186700910th Oct 2017 2:37 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Downsman wrote:
You get a long section of 16mm black battery cable with the T-Max kit, enough to install the kit provided you don't mind using black for both +ve and -ve leads.

You also get an LED battery indicator for inside the car, which has a button to manually link the batteries in case you need to crank from the 2nd etc.


perfect and many thks for the info, didn't know if i needed to get some more cable

only found out my dad had a spare battery which i charged up overnight , then kicked myself as it was 260mm long and wouldn't fit Big Cry , need one 240mm long ,

as i thought i could have installed the battery then until i get the T max system i could just connect some jump lead leads across the batteries if i needed the backup

have ordered a spare used battery bracket and bolts and some new battery clamps for now , will see what there like when they turn up

http://www.ebay.co.uk/itm/Red-Black-Car-Ba...SwMtxXttEG

think this aux battery will be ideal for what i need

https://www.tayna.co.uk/EXV70-Enduroline-L...P8727.html
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 


Last edited by gstuart on 10th Oct 2017 4:48 pm. Edited 2 times in total 
Post #186706110th Oct 2017 4:41 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Lost for Words wrote:
With failing diodes, the alternator could still output a healthy voltage. Check for alternating current - directly at the alternator if possible. Over 0.5V is bad news. Thumbs Up


hi

you've got a great point there as if i'm honest i'm pretty sure i didn't test that , assume u mean to use a clamp meter after the system has gone to sleep to see if there is any voltage on the alternator lead

also when i done the residual drain test before i can't remember if i locked the doors or set the alarm with the keyfob , will have to try and find the thread again and read up if i need to set the alarm or not, just used a paper clip before to link out the bonnet switch

thks again for the voltage figures that will be very useful Bow down
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 
 
Post #186706210th Oct 2017 4:45 pm
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Lost for Words
 


Member Since: 03 Sep 2013
Location: Warminster, Wiltshire
Posts: 6375

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

You could certainly do that, but no, what I meant was set your multimeter to the AC setting and measure at the alternator with the car running. As the alternator produces an alternating current naturally, the diodes are responsible for rectifying it into DC - getting it to flow the right way. If they start to fail, they let some current flow the wrong way, meaning as well as draining the battery, they let some of that alternating current through which you can detect with the multimeter. Thumbs Up
 Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off Sad )
Disco 3 06 reg B7S Manual Rimini Red Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped Very Happy
Several Discovery 300 TDis
 
 
Post #186725511th Oct 2017 7:21 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

many thks for the info , always good to learn something new

will try that out and most appreciated , thank u Thumbs Up
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 
 
Post #186766111th Oct 2017 11:53 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: Waiting for my old avatar to be allowed back... we miss her!
Posts: 17534

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Most cheapo multimeters will not do the AC voltage test to the accuracy required. Typically you need one that has RMS capability.

It is a very valid test though. Thumbs Up
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Post #186768912th Oct 2017 6:41 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

hi Robbie

appreciate the info, do u think one of these testers may be good enough plse

i've also got an iid is there any live reading i can get on there for the alternator or is just using a multimeter suffice

many thks Thumbs Up








 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 
 
Post #186769212th Oct 2017 6:52 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 1694

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

lets face it, if the alternator has failed, it will flatten/kill a battery overnight.

So if it hasn't done this....
  
Post #186775312th Oct 2017 11:08 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

hi

may i also ask what is the max voltage i should ever see please from the alternator

haven’t been able to find it on the forum and wondering if anyone may have a link please

many thks as always Thumbs Up
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 
 
Post #187270626th Oct 2017 4:59 pm
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Compusmentis
 


Member Since: 18 Feb 2016
Location: Effingham
Posts: 163

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Anything more than 14.4v is too much. Lead acid batteries start to gas off at about 14.5v
 New gearbox & TC, 2 x front wheel bearings, belts changed, new oil pump, new battery, new rear prop, new front prop, new front diff, front arb refurbed, front cv boot kit, egr blank and BAS software patch, full rear suspension / drivelive rebuild, LED trailer light fix, split charge.
Never had a 107, 90 or 127, but have had most of the rest! 
 
Post #187280226th Oct 2017 10:20 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 2225

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

hi

many thks for the reply

didn’t realise that if it goes over 14.4 volts it’s faulty
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted -Cruise control -Front electric seats- D4 steering wheel stalks 
 
Post #187281327th Oct 2017 1:46 am
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Oswiperus
 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 803

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

Alternator can charge as high as 15.5V on the disco but will generally settle back into the 14's after a while.
 Stu

D4 2016 hse lux montalcino red - current
D3 2005 se java black - current
D3 2005 base manual - gone 
 
Post #187283227th Oct 2017 7:17 am
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Compusmentis
 


Member Since: 18 Feb 2016
Location: Effingham
Posts: 163

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Maybe mine underperforms...

I have 2 voltmeters fitted to mine, one for each battery in the split charge system. I've never seen a value above 14.2v, even after a heavy discharge cycle
 New gearbox & TC, 2 x front wheel bearings, belts changed, new oil pump, new battery, new rear prop, new front prop, new front diff, front arb refurbed, front cv boot kit, egr blank and BAS software patch, full rear suspension / drivelive rebuild, LED trailer light fix, split charge.
Never had a 107, 90 or 127, but have had most of the rest! 
 
Post #187286527th Oct 2017 9:14 am
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Skynet
 


Member Since: 23 Jul 2014
Location: Melksham, Wiltshire
Posts: 682

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Depends on the journeys you do too. My drive to work is 8 miles which is not a long charge time when you use lights and heater. My voltmeter in cigar lighter socket shows 15.1 max but on longer journeys drops to 14.1V
 Dave
D3 2006 HSE, Cairns Blue

Wessex 4x4 Response
http://www.wessex4x4response.org.uk/ 
 
Post #187287427th Oct 2017 9:49 am
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