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Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

Battery drain TD5

Got a 53 td5 defender.
Used everyday, it's my car, school runs, kids taxi service etc. etc....

Always starts first crank.

Saturday, drove 140 miles to clacton and back, no problems.

Sunday went out to car, pressed the keyfob, wouldn't open doors.

turns out battery was so flat the central locking wouldn't work. Disconected the earth lead, put a tester on the battery got a reading started to disconnect the fuses, reading changed when I disconnected the central locking/alarm fuse.

Put tha battery on charge overnight, in the morning the battery was dead and my charger was humming.
Jump started it and it ran fine, starting ok.

Wednesday morning, battery dead, put it on charge, though only for a few hours (had a "taxi" pick up to do) disconnected the earth, put a mega meter on the earth lead & earth pole, fuel pump started and meter went of the scale, then gradually came down. Tried to start it but from reconnecting the battery and putting the key in the ignition the battery died.

What should I do next? Is it the fuel pump relay or the ECU?

Any advice will be gratefully received.
Helen

13th Apr 2011 3:21pm

party monkey

Member Since: 31 Dec 2010
Location: Oxon.
Posts: 1311

2005 Defender 110 Td5 XS CSW Cairns Blue

Hi Landgirl

Sounds similar to TC's recent problem too.....

Have a look here .... http://www.defender2.net/forum/topic5957.html

Sounds like you may have a similar problem.... Is your battery the original one from new ??? Jon - 110 td5 [sold]. Currently Defenderless.

13th Apr 2011 4:42pm

T1G UP

Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

2011 Defender 110 Puma 2.4 XS CSW Orkney Grey

i'd take a guess at battery. TD5 are VERY fussy about amps

13th Apr 2011 4:47pm

Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

party monkey wrote:
Hi Landgirl

Sounds similar to TC's recent problem too.....

Have a look here .... http://www.defender2.net/forum/topic5957.html

Sounds like you may have a similar problem.... Is your battery the original one from new ???

Hey Party Monkey,

Not sure on age of battery, had car for less than a year, will get it tested,

but why should the fuel pump run when the keys are in my pocket???

13th Apr 2011 4:53pm

Paul_1978

Member Since: 08 Nov 2009
Location: South Yorkshire
Posts: 384

The fuel pump should be off.

Under the drivers seat is a row of three / four relays, the fuel pump one is yellow (could be more than one yellow under there)

The relay should trun on when the key is in position 2 and off in position 1 or off.

Put your finger on the relay and feel for the click, if its stuck on, unplug and replace, be sure that the new relay is correclty seated, the plugs arnt very good.

13th Apr 2011 4:58pm

Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

Paul_1978 wrote:
The fuel pump should be off.

Under the drivers seat is a row of three / four relays, the fuel pump one is yellow (could be more than one yellow under there)

The relay should trun on when the key is in position 2 and off in position 1 or off.

Put your finger on the relay and feel for the click, if its stuck on, unplug and replace, be sure that the new relay is correclty seated, the plugs arnt very good.

Thanks Paul,

I turned the ignition on and the relay clicked and the pump ran, but when I turn the ignition off the pump continued to run even though the relay relay clicked again I could hear the pump gradually slowing down as the power in the battery fell.

So does this point to the relay? And now possibly a new battery as I don't know if it will survive.

13th Apr 2011 5:10pm

Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

T1G UP wrote:
i'd take a guess at battery. TD5 are VERY fussy about amps

Thanks T1G UP, will get the battery tested.

13th Apr 2011 5:13pm

Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

Just an update,

Replaced the fuel pump relay, after being on charge most of the day it started. I have noticed
that sometimes when I switch the car off the fuel pump continues to run. If I start up again and then turn off, the pump stops.

So what could be activating the relay to make the pump run?

Could it be an ignition fault?

Any ideas?

13th Apr 2011 8:58pm

christyler

Member Since: 10 Dec 2010
Location: Cork, Ireland
Posts: 67

Fuel Pump Relay

I have looked at the scematic for the fuel pump wireing,it apears that the fuel pump relay coil get its positive from the ignition relay, and it neg from the engine control module on a blue/violet wire, it might be worth checking this with a meter.

Also, for the pump to run the main relay would have to be "on" so maybe its the main relay stuck on, to check this meter the brown/orange wire on the fuel pump relay with the ignition off, if you have voltage there the main relay is stuck on.

If you dont have a meter just use a 12v bulb or tester.

14th Apr 2011 10:31am

Landgirl

Member Since: 10 Jun 2010
Location: Essex
Posts: 7

Just to finish,

Thanks to all the advise I was given,

Tried all suggestions, everything was as it should be.

The only thing that I can put it do to was A Parot (blue tooth device) which was in my husbands disco
park next to my defender. We removed it from the disco and since then I've had no problems. (Touch wood)
It seems that the parot was communicating with my TD5.

So If you get some weird and wonderful things happen to your TD5, make sure there's no PAROTs around.

xx

10th May 2011 2:39pm

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