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2002-2005 Range Rover MkIII / L322
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38 Posts
Discussion Starter · #1 ·
What is the best way to trace a battery drain.
Is it really a case of take one fuse at a time, lock up and wait 15-20 mins for the car to go to sleep before checking with ammeter/clamp meter??

When I first lock the car I have a 5 amp drain according to my clamp meter and then when the car "sleeps" I still have around a 0.5 amp drain. Leaving the car for even a day drops the battery low enough to start getting messages about things not working etc on the dash.

Any help/hints will be greatly appreciated.



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2013-2015 Range Rover MkIII / L322
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197 Posts
What year? The 03-04s had a problem with the headlight wipers that caused battery issues.
 

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Registered
2002-2005 Range Rover MkIII / L322
Joined
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38 Posts
Discussion Starter · #3 ·
Yeh is an 03.
Any idea what fuse to try if it is that??
Is annoying that even with regular daily use the battery never seems to stay fully charged.


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2010 SC 5.0 Range Rover MkIII / L322
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2,054 Posts
to fix the headlamp wiper issue you can disconnect the headlight washer pump connector this will remove power to the wiper motors.

More than likely what has happened is that one of the headlight wipers has been internally bent by an extra force on the wiper blade ,
this damages the internal tracking of the motor and causes it to stick and then it gets out of sync ,
and then it draws power, as it wont shut off since its not parked,
this will kill the battery.


If your wiper is not parked,
remove the fuse for the headlight wipers,
then start the car then shut off.
install the fuse then start the car ,
this should recycle the wipers.

If the wiper wont park ,
you could replace the motor with a used part,
or remove the wiper arm ,
and then disconnect the washer pump for the wipers

The other draw issue is from the blower resistor pack,
if you have never replaced this part,
then it would be wise to also replace it if the battery draw doesnt go away after working the wipers issue.

Buy a Behr unit they are costing about 58.00
NOTE buying the lesser cost units means it will likely fail in short order so you will have to repeat this repair,
There is a Youtube video to see how this is done
 
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