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Discussion Starter · #1 ·
I replaced a new battery in the '03 DB7GT manual last May, on trickle charge All the time; today it is dead, jumped it fine.

I hear a buzz like a pump running in the battery box; one of my mechanics,not an Aston guy BUT well versed in exotics says it sound and looks like some sort of pump back there;when you put your hand on it the buzz quiets down, could this be a air pump or something that is draining the battery running all the time? dogdoc, USA
 

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I replaced a new battery in the '03 DB7GT manual last May, on trickle charge All the time; today it is dead, jumped it fine.

I hear a buzz like a pump running in the battery box; one of my mechanics,not an Aston guy BUT well versed in exotics says it sound and looks like some sort of pump back there;when you put your hand on it the buzz quiets down, could this be a air pump or something that is draining the battery running all the time? dogdoc, USA
If you have a battery conditioner on all the time then the battery should not drain I would have thought as that's its purpose, to keep the battery upto speed when it detects a droppage of volts:confused::confused:

Have you got it set to the correct setting??? as I check mine daily to make sure it has not jumped off its correct setting.

Just a thought but it could well be that something in there is causing such a huge drain that the conditioner cannot compensate enough to keep the battery charged enough to start the car.

Has anything else on the car lost its settings such as the clock and or the window drops and radio code???

Regards,
 

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ok we did that, dealer tested battery, fully charged!

SO we now think Bendix, silenoid, etc.even the simple ground straps may be the problem. we will keep digging; I know the dealer here normally just starts replaceing parts rather than trouble shooting....Doc
 

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I can give you some advice anytime, problem solved!

I do not understand it BUT when the tech was going thru all the connections cleaning htem and tightening them he found on or near the starter the rubber boot was melted and a screw was melted. he said something about it was loose and so it was building resistance which builds heat....he reattached the screw etc and........she fires right up.

I have to say I see why many folks with hi line or exotics get frustrated with the cost of maintaining them; as he explained, if this was at the Aston dealer they likely would have replaced the starter etc. I tend to agree it is more efficient to sell you new parts then actual diagnose a problem, albeit diagnostic time does pay these guys.These guys charge $80 USD hour, cheap!!!!!!!!!

Had a phone problem this week, tech says there is a short, it's in the house somewhere, I can stay here all day to find it or we can just plug your phone directly into your modem....he was gone in 2 minutes..........doc
 

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The GT has a small vacuum pump in the there which is used to activate the Exhaust Bypass system.

Best thing to do is pull FUSE 22 and disconnect the system :) This essentially leaves the Bypass system in Bypass mode all the time :-D

NOTE* it's been over 5 years since I removed my fuse so it might be either #20 or #22

When I get my GT Technical Manual from my office I will confirm.

Also, if the car is to be laid up for some time and is kept inside, then lower the windows an inch then press the battery disconnect switch in the boot.

This limits the drain on the battery, then connect your battery conditioner. (not trickle charger)
 
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