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My mum has an 04 307cc 2.0L 70k and it has been causing her major headaches for the last four weeks. She has to disconnect the battery every night because in the morning, the battery flattens and the car won't start. The battery is a decent quality Varta that is only 6 months old. As I was visiting for the weekend I said I would take a look and bring along my multimeter to see what the battery was up to.

A couple of weeks ago, she took the car to an auto-mechanic - who then referred her to an auto-electrician (independent Peugeot specialist apparently). Sadly, neither of these guys could trace and isolate the problem. The auto mechanic had the car for three days but still could not find the fault.

I spent the best part of the day fiddling around with the car and it appears as though the car and components remain energised after the ignition key has been removed. All of the components of the car can be operated without the key in the ignition - apart from the climate control. Wipers, main beam, radio etc all continue to receive power and can be switched on and off.

The car behaves as though the ignition key is at “position I / accessories on” in the ignition barrel even though the key has been removed.

With the battery fully charged at 12.68v and all components off, I monitored the discharge rate with the key out of the ignition. It was depleting by about 0.10v per hour. This rate of discharge would result in a "flat" battery after approximately 10/12 hours. The alternator was putting a steadyish 14.40/14.60v into the battery with the engine running.

Another curious feature is that when the glove compartment is closed – with the key out of the ignition:

- the depletion rate from the battery is 3-4 times higher.
- the central display computer is illuminated.
- the battery light on the main console is illuminated.

With the glove compartment open, these three issues disappear and the depletion rate slows - but not enough to prevent a flat battery in the morning.

I tried resetting the BSI, removing the glove compartment bulb, removing the factory fitted radio and cd changer and by the time the daylight had gone, the above was all I had come up with.

So I have three questions I suppose....

1. Can anyone shed any light on these issues - from experience or from a technical/expert point of view?
2. As the car appears to have already been with an "Independent Peugeot Expert" for three days - is there any value (for me!) in taking it to the main dealer?
3. Can Planet be of any assistance in diagnosing the problem(s)?

The car can't be worth much more than a couple of grand so I am a little bit wary of being bent over by my local stealer.

Apologies for the wall of text. No use reaching out for help if you don't provide the full picture I guess.

**** SUMMARY ****

1. Battery flattens overnight because car and components remain energised even though ignition key removed and components are switched off.
2. Depletion rate is approx 0.10v per hour.
3. With glove compartment closed, depletion rate is a frightening 0.36v per hour - but battery light and central display illuminate when glove box closed. When glove opened, display and battery light disappear and depletion rate goes back to 0.10v p/h.

……Baffled………
 

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Have you been to Advanced Auto Electrical in Rock Ferry?

I'm guessing the "independent expert" was Benza? They're normally very good and I'd trust Tony over any of our local Peugeot dealerships any day of the week.
 

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Hi Gibbo

Thanks for the swift reply - and the advise. The local mechanic my mum uses is in Tenerife for a holiday and isn't contactable.

I have just found the number for Benza in Birkenhead - 0151 345 0847. I will give them a call now.

I had a terrible experience with the Mercedes dealership in Chester a few years back (totally incompetent, stuck up a**holes) and have made every effort to use Indies since then. Keeping up the MDFSH just isn't worth it!

Cheers

Stenners
 

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I'm in Oxton, I do much of my own work myself, but as I live in apartments with a communal open car park on a slope there's some things I can't do myself, or is a big hassle.

So I've got a few very trustworthy go-to people on the Wirral like Chris Gilly autos on Oxton Road (he was working Boxing Day!) and a retired mechanic friend in Upton who's son works at Euro Car Parts in Birkenhead, as well as Advanced Auto Electrical (I send every Wirral based 207 owner who comes to me with the rear light cluster fault there). Advanced were cheaper to supply and fit a new alternator on my 307 than it would be to buy one from Euro (even with discount) and fit myself.

Tony at Benza is a 307 driver and has a 205 too, its always reassuring to deal with people who practice what they preach!

Speaking of stuck up, that's what Peugeot Chester is like - all glass and polished marble and they look down on you if you dare go in for parts!
 

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Discussion Starter #6
I assumed that it was Benza that they had taken it to as well, but the mechanic is abroad on holiday.

However, I never got a chance to talk to the guys at Rock Ferry as I called Benza first and it was Tony who answered the phone. He said that our car was not on his system and he would have remembered it anyway as he doesn't see that many 307cc. So I told him the issue and we have arranged to take it down next week. He said he would spend an hour on it and run some tests (presumable Planet) and it would cost £48+vat. After the hour is up he will call us and tell us how much it is likely to cost to sort out.

I will post the outcome on here so that others may get some clues as to what could be causing their (similar) issues.

Once again, thanks for the information.
 

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"Speaking of stuck up, that's what Peugeot Chester is like - all glass and polished marble and they look down on you if you dare go in for parts"

Maybe that's a Chester thing. There's quite a few "entitled" people down there!
 

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Not got this problem yet but before I'd do I'd be interested to know what the problem was.
I've just purchased Planet/Diagbox Just incase I get any of those Dreaded electrical problems that people with 307cc's seem to get. In fact thinking about it it sounds like other than using planet and a analytical approach like you already have in checking various switches for correct actuation then I don't see what a Main Stealer could do except use they're experience with the same car and faults. If the dealers auto electricians actually Talk to each other that is. lol
 

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The main thing that springs to my mind would be a faulty ignition switch. Sounds like it's shorted which would cause the symptoms you describe. The climate control will only work with the engine running. The one thing that is puzzling and throws doubt on it being the ignition switch is that I would expect ECO mode to kick in and shut down non essential electrical circuits after around 20 minutes which would help to conserve the battery.
 

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Does the car have climate control?

I had a similar issue with an E39 5 Series. Every morning the battery was dead.

£150 new battery and £100 replacement alternator later and i found the issue to be a faulty hedgehog resistor in the dash.

Its the resistor that controls the climate control and has a direct feed to the battery. When it goes wrong it turns the fan on and off at will no matter whats going on with the ignition.

Probably not the issue here but just a thought.
 
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