Jaguar XK X150 2006. Battery drain issue
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Junior Member
Joined: Jan 2024
Posts: 29
Likes: 2
From: LONDON
There must be third party diagnostic tools available to do basic alterations on jag's.
Veteran Member
Joined: Apr 2008
Posts: 3,699
Likes: 1,695
From: Ottawa, Ontario, Canada
Many of us use SDD. The. “General Tech Forum” contains some stickies which outline the process for setup.
This being said, SDD is not intuitive. And a wrong move can result in a bad day.
This being said, SDD is not intuitive. And a wrong move can result in a bad day.
Last edited by guy; Jan 28, 2024 at 08:54 PM.
Have you done any troubleshooting ? Ammeter on negative side ? Would rather you used a battery minder in the meantime to keep it charged than disconnecting it..These aren't 60's or 70"s vehicles.
Agree with Guy about this disconnect as a solution. Think you're just asking for more trouble. Either you have a problem that needs to be found or it is normal light drain. These aren't xk120's or XJ6's These modern vehicles, regardless of make, need to either be driven or when not for days, weeks or months, to be on 'Minders" not chargers. A good battery kept in a charged state prevents headaches !
Senior Member
Joined: Aug 2012
Posts: 823
Likes: 437
From: Mechanicsville, Virginia, USA
It's the battery!
It's the battery!
I REALLY disliked the "It's the battery chorus.
However, having experienced two poor performing new batteries (different Jaguars), I have become a believer.
I always check date codes when shopping for a new battery and have walked away when the date was more than the previous month.
Still, I got poor (but acceptable, according to the dealer) batteries on occasion.
I did, finally, manage to get a warranty replacement on one. It made a world of difference.
Monitoring system/battery voltage with a cigar lighter voltmeter works well for me.
Normal system charging between 13.5 and 14.5V, depending on circumstances.
Ignition off battery voltage typically 13-12.9 volts. Steadily decays to 12.6V where it hovers until dropping to 12.5V or timing out.
If monitoring by voltmeter suggests a problem after ignition off, a simple battery test is to pull the battery, charge the battery on the bench (not concrete floor) to 13V. (12.6V + surface charge).
Remove charger and let the battery rest. Monitor the voltage decay. If after 24 hours the voltage is less than 12.6V get a new battery.
I REALLY disliked the "It's the battery chorus.
However, having experienced two poor performing new batteries (different Jaguars), I have become a believer.
I always check date codes when shopping for a new battery and have walked away when the date was more than the previous month.
Still, I got poor (but acceptable, according to the dealer) batteries on occasion.
I did, finally, manage to get a warranty replacement on one. It made a world of difference.
Monitoring system/battery voltage with a cigar lighter voltmeter works well for me.
Normal system charging between 13.5 and 14.5V, depending on circumstances.
Ignition off battery voltage typically 13-12.9 volts. Steadily decays to 12.6V where it hovers until dropping to 12.5V or timing out.
If monitoring by voltmeter suggests a problem after ignition off, a simple battery test is to pull the battery, charge the battery on the bench (not concrete floor) to 13V. (12.6V + surface charge).
Remove charger and let the battery rest. Monitor the voltage decay. If after 24 hours the voltage is less than 12.6V get a new battery.
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M1redskin
XK / XKR ( X150 )
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Jun 15, 2023 12:09 PM
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