Peugeot 406 - Peugeot 406 Current drain help

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Tue 28 Apr 2015 18:05
Peugeot 406 - Peugeot 406 Current drain help - Richie Boro

I have just acquired a 2002 peugeot 406 2.0 hdi 90 bhp siemens model. I put a brand new battery on and refurbished alternator as they were both suspect anyway when I bought it. However it drains the battery when stood. It did before replacing parts and after so not the new parts.

I have had a meter inline wth the battery when everything locked and off etc, it shows a constant drain of 0.16 amp. Obviously I want this down to 0.01 amp. Having worked my way through every fuse in the car I get it as fuse 9 on the fascia fuseboard (28 fuses fascia 1) and its a 5 amp fuse. I pull this and it drops to 0.01 amp.

Listings for the fuse only come back as BSI fascia 1 so assume its the BSI board directly below the fuse board which I assume does the internal stuiff like central locking and instrument panel etc. This has 6 fuses on board it. I pulled them with the previous fuse 9 in place and they make no difference.

Ive went through all the Autodata wiring diagrams and none of them can help identift what exactly the troublesome fuse is actually powering via the BSI. All I know is if I pull it then the hazards go haywire, central locking goes off, stereo goes off, heater panel goes off etc. Could it just be a relay on the bsi stuck but not using another fuse?

Anyone got any better wiring schematics or had a similar problem with a resolution?

Thanks in advance

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Tue 28 Apr 2015 20:55
Peugeot 406 - Peugeot 406 Current drain help - Peter.N.

Has it by any chance got an aftermarket radio, if it has and doesn't have the proper adaptor lead it can upset the BSI.

It will take a long time to run a decent battery down at 160ma, its only about 4ah per day but I agree it is excessive. What happens when it shuts down, does the current remain steady or does it vary?

Best value secondhand car on the market the 406 2.0. Hdi, mine has done 235,000 miles and still has the original clutch and DMF and practically everything else. The 110hp is even better, the tax is cheaper.

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Wed 29 Apr 2015 06:52
Peugeot 406 - Peugeot 406 Current drain help - Richie Boro

Hi it dies have an aftermarket stereo but even if I unplug it completely the drain is still there. It kills the battery enough overnight ti make the starter extremely sluggish and takes the car ti the point of almost not starting. Simething I need to rectify before any cold weather. Think I might go over the schematics again and see exactly what runs through the bsi under the dash and start to eliminate things one by one.

The current is initially 0.7 ish but drops within a minute of locking to .16 and then remains steady. Guessing the .7 is just some courtesy circuits closing down. Could it be something as simple as the bsi having a poor earth?

Edited by Richie Boro on 29/04/2015 at 06:54

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Wed 29 Apr 2015 09:26
Peugeot 406 - Peugeot 406 Current drain help - elekie&a/c doctor

An IOD of 160ma is not going to drain a battery overnight.Are you sure the meter you are using is accurate?

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Wed 29 Apr 2015 10:37
Peugeot 406 - Peugeot 406 Current drain help - Richie Boro

Used 3 different meters to confirm it. All gave same results.

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Wed 29 Apr 2015 16:29
Peugeot 406 - Peugeot 406 Current drain help - Richie Boro

Quick update, solved it. NSR door motor for dead locking is acting up. As soon as I unplugged it the current dropped to 0.015amp.

Whilst poking about however I discovered my glowplugs never come on, not even when running. New relay ordered to be on the safe side :D

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Wed 29 Apr 2015 20:00
Peugeot 406 - Peugeot 406 Current drain help - elekie&a/c doctor

Good to see a fix on the battery drain issue.Regarding the glow plugs,you need to be careful here ,as this is an hdi engine that does not need glow plugs to start from cold unless the ambient temp is around 5 degrees or below.Also make sure the glow plugs are good,because if they are dead/open circuit ,the relay will not activate.

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Wed 29 Apr 2015 21:44
Peugeot 406 - Peugeot 406 Current drain help - Richie Boro

yeah I have also ordered new glow plugs anyway as a matter of servicing. I knew they didnt always come on when starting but as far as I was aware they should come on during running, particularly during warm up for the emissions. Time will tell with new parts and winter months in the future.

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Thu 30 Apr 2015 15:27
Peugeot 406 - Peugeot 406 Current drain help - Gibbo_Wirral

This chart shows glow plug time usage, pre and post heating

i26.photobucket.com/albums/c134/gibbo501/hdiglows....l

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Fri 1 May 2015 20:25
Peugeot 406 - Peugeot 406 Current drain help - Peter.N.

Pleased you found the problem but if a drain of 160ma flattens your battery overnight its time for a new one. Because of the large plate area they will still provide enough power to start the car, providing it starts first time, when their capacity has fallen to a fraction of the original but has very little reserve power.

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