Battery current at rest

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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PeterN
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Battery current at rest

Post by PeterN » Thu Dec 14, 2017 5:30 pm

We have two 406 Hdi estates but my wife's gets used mostly, I tried to start mine a couple of weeks ago and the battery was flat, I replaced it with another from the workshop and the same thing happened after about a week.

I checked the current draw on mine and it was about 1.3 amps immediately after the ECU had shut down but after a few minutes it dropped to 240ma. I tried the wife's and that did more or less the same except it dropped to 170ma.

I realise that a discharge of 240ma is going to draw about 6 Ah per day so 10 days would probably be about the limit for it not to be used, the other one at 170ma would last a day or two longer.

After all that my question is are those currents about right? If so I am going to have to disconnect the battery on mine when I'm not using it, the reason I ask is that its never gone flat before - but maybe I have used it more often.

Peter

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steve_earwig
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Re: Battery current at rest

Post by steve_earwig » Thu Dec 14, 2017 9:33 pm

No idea on there (and I can't go test it neither :( ) but I did a search and see figures starting at 50mA up to 90mA and anything over 100mA is a problem :frown:
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
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PeterN
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Re: Battery current at rest

Post by PeterN » Fri Dec 15, 2017 11:16 am

Thanks for that, seems I have a problem with both cars then only one being in continual use seem's to be OK,

Peter

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steve_earwig
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Re: Battery current at rest

Post by steve_earwig » Fri Dec 15, 2017 11:43 am

That was mostly for fairly modern Nazimobiles but I can't see D9's being much different.

The usual rule applies: anything aftermarket is immediately suspect.
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - Can somebody stand by with an extinguisher?

PeterN
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Re: Battery current at rest

Post by PeterN » Fri Dec 15, 2017 11:49 pm

My wife's car has an aftermarket radio but mine is still the original - and mine is worse. I don't want to be chasing a non fault so I think I will just disconnect the battery when I'm not using it.

Liked your roundabout pictures Steve!

Peter

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Re: Battery current at rest

Post by piglet » Sun Dec 17, 2017 6:59 pm

steve_earwig wrote:
Fri Dec 15, 2017 11:43 am
The usual rule applies: anything aftermarket is immediately suspect.
I fitted 2 Chinese Ebay USB sockets in the Connect.
One was continually warm and drawing double the other so I replaced it but they will do the battery if left too long.
2003 estate Hdi90 Siemens Fully pimped (roofrack&towbar)

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steve_earwig
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Re: Battery current at rest

Post by steve_earwig » Sun Dec 17, 2017 7:48 pm

They sound like quality gear to me!
Image
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - Can somebody stand by with an extinguisher?

trufflehunt
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Re: Battery current at rest

Post by trufflehunt » Sun Dec 17, 2017 9:35 pm

PeterN wrote:
Fri Dec 15, 2017 11:49 pm
My wife's car has an aftermarket radio but mine is still the original - and mine is worse. I don't want to be chasing a non fault so I think I will just disconnect the battery when I'm not using it.

Liked your roundabout pictures Steve!

Peter
My project car is a Mazda MX5, which are notorious for draining batteries while sitting around in wintertime. The immobiliser
will reduce mine to about 11.8 Volts in 8 days. Not enough to get started.

I fitted one of these, a Richbrook Discarnect. https://www.ebay.co.uk/itm/Richbrook- ... xjIJ4IlRUw

Just needs a few turns to disconnect/reconnect, or can be completely unscrewed and removed for extra security.
There are some cheap copies also on that auction site, but they don't have the 'Discarnect' Trademark on the knob,
the knobs are usually green, and the metal quality is about the same as chocolate.
Last edited by trufflehunt on Mon Dec 18, 2017 11:51 am, edited 2 times in total.
2002 VW Golf 1.9 TDI (100 bhp)
1993 Mazda MX5 Mk1 1.6
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grasmere59
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Re: Battery current at rest

Post by grasmere59 » Sun Dec 17, 2017 9:45 pm

I can leave my D9 110 exec estate for 2 to 3 weeks and it's starts fine after that.
2003 "53" 110 hdi Executive Estate in Diablo Red,chesnut leather
2001 "51" BMW 530i sport auto in Black,sandstone leather
2012 "62" Yamaha XT1200 Super Tenere
1974 "M" Honda CB500/4
1994 "M" Kawasaki Zephyr 1100
2002 "02"Triumph Tiger 955i
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GingerMagic
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Re: Battery current at rest

Post by GingerMagic » Sun Dec 17, 2017 11:07 pm

I've left my old 406 for over 5 weeks and it started no problems - unlike it's replacement that needs jump starting after about 7 days... Pfft.
I think Marcel had a battery drain that took a very long time to find, but I believe it was a deteriorated earth strap...
Hope you sort it out Peter.
1999 T4 family wagon, slow as a turd but the kids like it
2002 Citroen Xsara Picasso Hdi90 - Dirtied by the kids, Dented by the wife....
Sadly sold the 406, best cars I have ever owned
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

PeterN
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Re: Battery current at rest

Post by PeterN » Mon Dec 18, 2017 11:10 am

I have decided to leave things as they are, there is 70ma difference between the two cars so I may be looking for a fault that isn't there. It could be that the battery capacity has declined on both of them, I have never replaced them.

I spent 50 years looking for obscure faults, I was a TV engineer, so I don't really want to start start doing it again again. The one we use more frequently doesn't give any problems but the other one could be left for two or three weeks before we use it again.

The battery dis connector is a good idea but the + lead had a snap on connector anyway so its easy enough to remove.

Thanks for all your help.

Peter

grasmere59
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Re: Battery current at rest

Post by grasmere59 » Mon Dec 18, 2017 5:34 pm

I'd be very very cautious about disconnecting and connecting the battery on a 406,strange things can happen to the electrics on them.My battery was labouring a bit in this cold weather so i fitted an Exide 096 battery to it and it spins over like a mad thing,i reckon with that battery on it i could leave it for a couple of months now if needed.I would just get a new higher Amp battery and see how that goes if i were you.
Last edited by grasmere59 on Mon Dec 18, 2017 6:52 pm, edited 1 time in total.
2003 "53" 110 hdi Executive Estate in Diablo Red,chesnut leather
2001 "51" BMW 530i sport auto in Black,sandstone leather
2012 "62" Yamaha XT1200 Super Tenere
1974 "M" Honda CB500/4
1994 "M" Kawasaki Zephyr 1100
2002 "02"Triumph Tiger 955i
1998 "S" Honda XRV 750 Africa Twin

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Doggy
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Re: Battery current at rest

Post by Doggy » Mon Dec 18, 2017 6:32 pm

+1 a decent 096 battery is your friend - I'm on my 5th winter with the cheapest 096 i could find.
If you must disconnect the battery, observe the procedure, else it will bite you one day, (tee shirt available). :oops:
2003 HDi 2.2 6-speed Exec Estate

grasmere59
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Re: Battery current at rest

Post by grasmere59 » Mon Dec 18, 2017 6:54 pm

Doggy wrote:
Mon Dec 18, 2017 6:32 pm
+1 a decent 096 battery is your friend - I'm on my 5th winter with the cheapest 096 i could find.
If you must disconnect the battery, observe the procedure, else it will bite you one day, (tee shirt available). :oops:
I've also got one of those tee shirts. :oops:
2003 "53" 110 hdi Executive Estate in Diablo Red,chesnut leather
2001 "51" BMW 530i sport auto in Black,sandstone leather
2012 "62" Yamaha XT1200 Super Tenere
1974 "M" Honda CB500/4
1994 "M" Kawasaki Zephyr 1100
2002 "02"Triumph Tiger 955i
1998 "S" Honda XRV 750 Africa Twin

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Welly
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Re: Battery current at rest

Post by Welly » Tue Dec 19, 2017 12:25 pm

Reminds me of replacing the Volvo's battery..........waited for the ECU to go to bed, disconnected the old battery, went to get the new one...........realised it was still in the boot which opens on a solenoid switch :lol: :oops:

I can't remember how a 406 can play up after a battery change? was it the leccy windows and door lock capers? I kept mine 'awake' with another battery frigged up with jump leads so it didn't know the battery was being changed :supafrisk:
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