Wales
by Joske Vermeule, September 1
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Forums39
Topics49,868
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Jun 14th, 2026
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Joined: Oct 2013
Posts: 6,723 Likes: 2
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2013
Posts: 6,723 Likes: 2 |
All my Morgans needed a battery conditioner on otherwise after approx 2 weeks they would have flat batteries, this was not a problem but I often wondered why as my tin tops can be left indefinitely and not drain the batteries.
I always used a conditioner whilst not in use, on the Aero I could flick a switch under the bonnet and isolate the battery which was easy except I had to reset the electric windows every time I did it.
Ian I agree, it's strange. I have no conditioner on mine, and the most it's been left is about three weeks but it started fine so until it struggles I'm leaving alone!
Steve
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Joined: Jul 2007
Posts: 27,816 Likes: 749
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,816 Likes: 749 |
Some have clocks fitted that drain the battery or the ignition immobilizer maybe.
Or it could be an earth leak. We had a VW Golf that discharge through a faulty courtesy light switch.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
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Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
Mine is most definitely the dash module circuitry, I even disconnected the instruments, something either on the circuit card at the dash or the black conversion module in the ECU housing.
Quite easy for me to pull fuse 17 (that's the one in my Roadster).
100's of milli-amps are drawn across that fuse when the car is off.
Which is significant.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Sounds as if you need a secondary "power switch" on the dash to turn off the feed to Fuse 17!
But seriously, why should the dash module need to be powered when the ignition is off? Is it something to do with the immobiliser? Very odd indeed.
All the Aeros have a master switch on the "computer box" that turns everything, and I mean everything, in the computer box off.
Peter
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
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Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
I have just contacted Caerbont.
If I can get to the bottom of my issue I'll be sure to let you folks know.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3)
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Joined: Jun 2015
Posts: 431
Learner Plates Off!
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OP
Learner Plates Off!
Joined: Jun 2015
Posts: 431 |
Just fitted new battery (not banner but lion exide) and put it straight on trickle charge. Hope this will cure the issue otherwise I may look at a battery cut out switch.
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