Dead battery (1 Viewer)

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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
Leaving my van in storage and after a week,started fine.but left it for 2 weeks and the battery was dead.would the internal clock do this?as I switch everything off and its the only thing I see working,but was told,this switches off after a certain time,but never checked that.i'm planning to get a switch fitted and isolate the engine battery.thanks.
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
54,869
156,948
On the coast in West Sussex
Funster No
658
MH
Carthago Compactline
Exp
Since 2008 & many years tugging
The starter battery should be OK for 3 to 4 weeks & leisure battery a lot longer.
The battery is probably on it's way out and has it's gone flat it is best to replace it. If it's a Fiat low starter battery volts often kills the Airbag EUC.

Better to fit solar to keep the batteries charged, disconnecting the starter battery for any length of time can cause problems with the ECU units and may require a dealer reset afterwards.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
The battery is 3 months old mate.the problem is the parasitic draw somewhere and I'm guessing the clock if it doesn't switch off.cheers.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
The radio,as far as I know switches on and off,no standby.its an 02 fiat ducato mate.

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Gellyneck

LIFE MEMBER
Jun 5, 2014
9,884
20,073
Scotland
Funster No
31,836
MH
C Class
Exp
More than toes wet now!
The battery is 3 months old mate.the problem is the parasitic draw somewhere and I'm guessing the clock if it doesn't switch off.cheers.
Alarm, tracker, radio \ media centre, etc will all draw power even when switched off.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
What's the solution please,obviously power is a main concern in these vans.cheers.
 
Apr 3, 2018
3,881
10,968
Funster No
53,151
MH
PVC
Exp
1995-2004 & 2017》
You say stared fine, then 2 weeks later did not....
Did you run long enough to put what you used to start first time back into battery???
You may have depleted enough to compound your problems. 👍👍👍

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Dec 24, 2014
9,506
49,176
Hurstpierpoint. Mid Sussex.
Funster No
34,553
MH
Compass Navigator
Exp
Ever since lighting was by Calor gas.
........and the battery was dead.........
Did you get any dashboard lights?
Have you checked the battery voltage at its terminals by using a meter?
If the battery is only 3 months old it could be just bad Earth or battery connections, mate.

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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
You say stared fine, then 2 weeks later did not....
Did you run long enough to put what you used to start first time back into battery???
You may have depleted enough to compound your problems. 👍👍👍
Something and can only be the internal clock is draining the battery mate.so going to get an isolator fitted.cheers.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
Did you get any dashboard lights?
Have you checked the battery voltage at its terminals by using a meter?
If the battery is only 3 months old it could be just bad Earth or battery connections, mate.
Completely dead mate,nothing.yet left a week in storage,started first time
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
I'll test it first when charged etc,might be throwing money away without testing mate.
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
54,869
156,948
On the coast in West Sussex
Funster No
658
MH
Carthago Compactline
Exp
Since 2008 & many years tugging
I'll test it first when charged etc,might be throwing money away without testing mate.
They never recover properly capacity will be reduced, all seems great until that morning when they let you down.

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Apr 26, 2015
3,000
7,427
Ottershaw
Funster No
36,067
MH
Hymer S820
Exp
First motorhome May 2021
This is a very handy tool for evaluating your starter battery and charging system, also a failed diode in your alternator may be the cause of parasitic drain.

 
Apr 3, 2018
3,881
10,968
Funster No
53,151
MH
PVC
Exp
1995-2004 & 2017》
They never recover properly capacity will be reduced, all seems great until that morning when they let you down.
When I first got my van I (6yrs ago) I stupidly let my cab battery go flat, flat, flat,, not even light on.
Jump started it and got home after 5hr drive.
Since then absolutely no problem.. Will sit in drive for 4 or 5 weeks even in winter and start first time...!!
Was I lucky.. exceptional battery or Lenny HB , dare isay it, you maybe being over cautious..
 

Gellyneck

LIFE MEMBER
Jun 5, 2014
9,884
20,073
Scotland
Funster No
31,836
MH
C Class
Exp
More than toes wet now!
When I first got my van I (6yrs ago) I stupidly let my cab battery go flat, flat, flat,, not even light on.
Jump started it and got home after 5hr drive.
Since then absolutely no problem.. Will sit in drive for 4 or 5 weeks even in winter and start first time...!!
Was I lucky.. exceptional battery or Lenny HB , dare isay it, you maybe being over cautious..
Conversely, we had a low battery warning on our control panel, motorhome started first turn of the key but experienced issues with airbag ECU. Battery was around six years old so replaced.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
When mine went flat after charging it I checked the capacity by monitoring it over a couple of weeks it was down to about 60% & 4 years old so I replaced it.
I have got a monitor and it comes through my mobile,but you have to be next to the van for it to work.it hasn't got any distance mate

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Lenny HB

LIFE MEMBER
Oct 18, 2007
54,869
156,948
On the coast in West Sussex
Funster No
658
MH
Carthago Compactline
Exp
Since 2008 & many years tugging
I have got a monitor and it comes through my mobile,but you have to be next to the van for it to work.it hasn't got any distance mate
I checkeed the current drain then just went out to the van every day & checked the voltage and compared the level of discharge to the SOC.
 
Apr 27, 2016
7,101
8,360
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
Something and can only be the internal clock is draining the battery mate
It's a bad idea to assume that without any measurements. A normal vehicle quiescent consumption should be a lot less than 50mA. Motorhomes seem to have extra devices fitted that have high quiescent consumption, 200mA is not unusual. Also some electronic control units (ECU) can fail to go into 'deep sleep' mode like they are supposed to, so they can be taking unpredictable power too.

That's one reason why a clamp meter, as Lenny HB suggested, is great for this. no need to disturb the circuit by disconnecting it and reconnecting it again, you measure the real current consumption.
 
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Gary Molloy

Free Member
Aug 23, 2018
87
17
Funster No
55,805
It's a bad idea to assume that without any measurements. A normal vehicle quiescent consumption should be a lot less than 50mA. Motorhomes seem to have extra devices fitted that have high quiescent consumption, 200mA is not unusual. Also some electronic control units (ECU) can fail to go into 'deep sleep' mode like they are supposed to, so they can be taking unpredictable power too.

That's one reason why a clamp meter, as Lenny HB suggested, is great for this. no need to disturb the circuit by disconnecting it and reconnecting it again, you measure the real current consumption.
I intend to buy one of those mate.cheers.
 

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