D

Disco1979

Member
Hi all
I haven't been on here for a while as i sold my RR but I have a friend with a disco 3 2006 2.7 diesel who I am trying to help.
He is getting battery drain, if he leaves if for 2 days the battery is dead so he put a second battery on it with a switch so when his main battery died he could switch over to the other one. but last time it died both batteries where dead.
Any one have any pointers please.
Thanks guys
Mark
 
Take off one of the battery leads & connect a multi meter set to DC amps between the battery terminal and the lead that you removed, this will measure the current drain from the battery. With the ignition off, you should measure a few miliamps no more. If there's a few hundred miliamps, then go round pulling fuses out one at a time until the current drops, this would be a reasonable starting point. NOTE : don't try and start the engine or use any high drain ancillaries with the multimeter connected otherwise you'll blow it's internal fuse.

Mat
 
Disco1979 said:
Thank you Mat I will let my friend know it's a good starting point.
Thank you
Click to expand...

You will need to jam the bonnet switch down and wait the for the car to go to sleep, sometimes as long as 20 minutes.
Alternator failure is not unusual with the D3 and its recommended to only use a Denso unit, recons dont last and any other make also seems to cause issues, if left it also wrecks the battery as well, batteries lucky to last 3 maybe 4 years.
Yuasa 019 are pretty good.

Ps dont forget there are loads of interior lights incl the glove box and door bottoms, something like 13 in total so maybe worth a look at them? the two lights over seats 6 and 7 are manually switched and even if left on cannot really be seen from the drivers seat.
 
Hi @Disco1979

had the pleasure of tracing a residual battery drain on mine

what year and model is the D3 plse,

test for the alternator diode , set ur multimeter onto AC volts , engine running , test leads onto each battery post , get someone to raise the engine around 1500 revs , see if ur get any reading

Next , engine off, as mentioned u can use a paper clip and link out ur bonnet switch , is on the left hand side , alarm the vehicle , double press the remote lock button which will turn off the internal alarm , and wait 30 x minutes for the system to go into sleep mode

what ever u do don’t pull fuses out, as ur wake the system back up

use a multimeter set to M amps and put ur test leads onto the back of each fuse in the engines fuse box

enclosed a chart as well of what readings u should have

hope that helps

087C4865-5E48-4F8E-A847-3B4A7944233D.jpeg
7B05141B-22FD-4113-98A5-FB2F566E76D0.jpeg
25D1FCD4-A70E-4094-8200-6E329A2FCDB0.png
 
Last edited:
Also using a clamp meter helps , for the J fuses I made up some test leads but see how u get on first

13FF9DC0-73CC-4873-8572-C41520F02DDC.jpeg
92459196-946E-4A87-808B-DBEB526BAD47.jpeg
 
gstuart said:
Hi @Disco1979

had the pleasure of tracing a residual battery drain on mine

what year and model is the D3 plse,

test for the alternator diode , set ur multimeter onto AC volts , engine running , test leads onto each battery post , get someone to raise the engine around 1500 revs , see if ur get any reading

Next , engine off, as mentioned u can use a paper clip and link out ur bonnet switch , is on the left hand side , alarm the vehicle , double press the remote lock button which will turn off the internal alarm , and wait 30 x minutes for the system to go into sleep mode

what ever u do don’t pull fuses out, as ur wake the system back up

use a multimeter set to M amps and put ur test leads onto the back of each fuse in the engines fuse box

enclosed a chart as well of what readings u should have

hope that helps

View attachment 192142 View attachment 192143 View attachment 192141
Click to expand...


Gary how does it work as you appear to be testing across the fuses and if the fuses are intact then Im not sure how the meter can give you anything sensible?
 
lynall said:
Gary how does it work as you appear to be testing across the fuses and if the fuses are intact then Im not sure how the meter can give you anything sensible?
Click to expand...

here u go buddy , robbie done a great guide

https://www.disco4.com/forum/post1366423.html#1366423

when I set my meter onto Ma i was looking for any residual readings going across the fuse and determining if that particular circuit was any pulling power with the vehicle was in its sleep state

also can’t pull the fuses out one by one as it wakes the system up
 
Last edited:
Done the same for the inside fuse box, drop the catches on the door and disabled the interior lights

Secured the test leads together and then used the test points on the back of the fuses to see if anything was still using power

515C43ED-2A0A-44A3-9690-1ECEA84855D9.jpeg
67F83686-C7F4-4635-943F-1AE6F039D0C7.jpeg
 
lynall said:
Seeing thta pic reminds me I have all them adaptors in the power prove test kit that I cant remember the last time I used!
Click to expand...

Thought about buying one a while back, suppose to be very good

when I was trying to trace my airbag faults I got a wire tracer
 
gstuart said:
hi

Don’t tell me , I may, just may have shown u something new , lol :p

also got one of the Hantek clamp meter which also helped

View attachment 192210
Click to expand...

Yep new to me, but to be fair slow battery drain is not one of the problems we see at work, it is normally batteries on their way out or some dimwit driver has left something switched on then gone home.
 
I’ve got this problem now. Suddenly appeared but it is intermittent. I wonder whether my battery is just shot. I hope so anyway. Sometimes the car lasts a few days, sometimes not even an hour. I guess the only way to know is to buy a new battery.
 
You must log in or register to reply here.

Similar threads

Cyrus 200
Battery Drain
Replies
6
Views
397
Cyrus 200
Cyrus 200
R
63 reg Disco TDV6 268bhp auto commercial, battery light on
Replies
10
Views
401
roythebus
R
D
Disco sport p300e hybrid battery issue
Replies
1
Views
731
Scottydog1
S
K
Disco 4 (LR4) xenon lights
Replies
0
Views
456
kiven
K
tweedandbriar
Battery Clamps...
Replies
12
Views
408
dag019
dag019