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Re: Heated Screen Light Question [Re: Peter J] #682910
13/01/21 05:24 PM
13/01/21 05:24 PM
Joined: Jul 2007
Posts: 18,726
Suffolk
John V6 Offline
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John V6  Offline
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Joined: Jul 2007
Posts: 18,726
Suffolk
Yes, KISS. That or take out the bulb but that is more difficult.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Heated Screen Light Question [Re: Peter J] #682918
13/01/21 05:48 PM
13/01/21 05:48 PM
Joined: Aug 2013
Posts: 13,398
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
Member of the Inner Circle

Joined: Aug 2013
Posts: 13,398
Salisbury, UK
The battery this evening shows 12.4v and 95% charged on the RING charger/conditioner.
We shall see what happens overnight!


Peter,
V8s are best....
Tarka the 'Otter Mog....2014 Plus 8
AMG C63 Estate.


Re: Heated Screen Light Question [Re: Peter J] #682970
13/01/21 09:29 PM
13/01/21 09:29 PM
Joined: Sep 2010
Posts: 1,886
Wales
T
Taffmog Offline
Talk Morgan Enthusiast
Taffmog  Offline
Talk Morgan Enthusiast
T

Joined: Sep 2010
Posts: 1,886
Wales
My Aero plus 8 does exactly the same, light glows dimly when ignition is off and brightly when heated screen is working. I would imagine it does drain the battery eventually but I always knock the power switch off under the bonnet when parked up overnight so can't comment.


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
Re: Heated Screen Light Question [Re: Peter J] #683063
14/01/21 01:20 PM
14/01/21 01:20 PM
Joined: Aug 2013
Posts: 13,398
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
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Joined: Aug 2013
Posts: 13,398
Salisbury, UK
And what happened...?

12.4v and 80% charge.

I'll charge it to 100% and then see how long it holds. More in a few days.


Peter,
V8s are best....
Tarka the 'Otter Mog....2014 Plus 8
AMG C63 Estate.


Re: Heated Screen Light Question [Re: Peter J] #683075
14/01/21 02:34 PM
14/01/21 02:34 PM
Joined: Feb 2016
Posts: 3,411
East Harling, Norfolk UK
RichardV6 Offline
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RichardV6  Offline
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Joined: Feb 2016
Posts: 3,411
East Harling, Norfolk UK
Originally Posted by Peter J
And what happened...?

12.4v and 80% charge.

I'll charge it to 100% and then see how long it holds. More in a few days.

FWIW Peter 12.4 volts if an accurate off load figure taken an hour or so after last use, equates to 70% charge of whatever battery capacity you have. Don't be fooled by figures from your charger.

Can I assume you were holding back from charging whilst the screen heater switch lamp was off using the trick you found of turning off engine with heater on, in order to establish any reduced drain?

By far the best way to check on drain is to insert an ammeter of sufficient range (several amps) in either of the main battery leads and not after any split. Don't be tempted to turn anything on whilst performing this test as you'll likely blow the meter.

Last edited by RichardV6; 14/01/21 02:36 PM.

Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1960 Velocette Venom
Re: Heated Screen Light Question [Re: Peter J] #683278
15/01/21 03:34 PM
15/01/21 03:34 PM
Joined: Aug 2013
Posts: 13,398
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
Member of the Inner Circle

Joined: Aug 2013
Posts: 13,398
Salisbury, UK
I put the charger on, presently showing 12.9v and 90%.
When it is showing 100% I'll stop the charge and leave it, to see how it lasts!!


Peter,
V8s are best....
Tarka the 'Otter Mog....2014 Plus 8
AMG C63 Estate.


Re: Heated Screen Light Question [Re: Peter J] #683601
17/01/21 11:32 AM
17/01/21 11:32 AM
Joined: Aug 2013
Posts: 13,398
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
Member of the Inner Circle

Joined: Aug 2013
Posts: 13,398
Salisbury, UK
11:30 am the battery charger test is showing 13.7v, 100% charge.
I've disconnected the charger and will check again every. 24 hours until the battery charge has dropped to 70%.
Not exactly exciting... but interesting!


Peter,
V8s are best....
Tarka the 'Otter Mog....2014 Plus 8
AMG C63 Estate.


Re: Heated Screen Light Question [Re: Peter J] #683605
17/01/21 11:40 AM
17/01/21 11:40 AM
Joined: Jul 2007
Posts: 18,726
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
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Joined: Jul 2007
Posts: 18,726
Suffolk
Peter, I hope it works out for you. I hate modern car electrics. Far too complex frankly.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Heated Screen Light Question [Re: Peter J] #683686
17/01/21 05:06 PM
17/01/21 05:06 PM
Joined: Aug 2013
Posts: 13,398
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
Member of the Inner Circle

Joined: Aug 2013
Posts: 13,398
Salisbury, UK
John,

in the end it is almost academic.

If turning the ignition off with the heated screen on solved the loss of charge then the job is done.
If it does not then we have an unknown drain, so I know:

1. The battery loses charge with time.
2. I have a battery maintenance charger
3. As long as I remember to keep the car connected to the charger I can always start the engine...


Peter,
V8s are best....
Tarka the 'Otter Mog....2014 Plus 8
AMG C63 Estate.


Re: Heated Screen Light Question [Re: Peter J] #683691
17/01/21 05:22 PM
17/01/21 05:22 PM
Joined: Jul 2007
Posts: 18,726
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
Member of the Inner Circle

Joined: Jul 2007
Posts: 18,726
Suffolk
True


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
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