Thank you for your reply and further info..

Regardless of the diagnostics that have been done, there is obviously a problem with the battery draining so something has been missed...

There are no common faults with this model in this regard so its going to be a case of having this checked to find the cause of the battery drain..

"Ordinary " plug-in type diagnostics are not going to find / cure this - It has to be done with a multi meter - ohm meter - a specific test procedure on the battery ...

So, The first thing to do is a test for a major short. Remove the positive and negative cables from the batteries. Put an Ohm-meter across the positive and negative cable. If your reading is close to 0 Ohms then you have a direct short. You need to trace the short before you can perform the following tests.

1. f you don't already have one, get a digital meter capable of reading up to 10 amps DC. You can get these reasonably cheap from car shops locally.
2. Your battery must have a reasonable charge for this test - it won't work if your battery is dead.
   
3. Check to make sure ALL loads are turned off. Unplug anything you may have plugged into the cigarette lighter. Remove your keys from the ignition. Close all doors so the interior lights are off.
4. Disconnect the thick positive (Red) cable that goes down to the starter.
5. To start make sure your meter is set to the 10 amp DC range. Some meters have a special connector for the red probe when you are reading current. The meter pictured on the left has one jack for high amps and one for low amps. If yours does, make sure the meter end of the probe is in the right connector. You can either do this next step by just holding the meter probes to their respective contact points (you won't get a shock from 12 volts) or you can use probes with alligator clips to snap them in place so your hands are free to do something else.
6. Connect the positive probe to the battery - either battery is fine, electrically speaking, since they are connected together by the negative (Black) wires. Polarity on digital meters doesn't matter because they are auto sensing.
7. Connect the negative probe to the red cable that is still connected to the vehicle. Make sure this cable and your probe do not touch ground.
8. If there is a severe current draw (more than 10 amps) it will either pop a fuse in your meter or destroy it outright. That's why you need to test for a short, otherwise, your meter should now be reading the current drain on your battery.
9. As your vehicle has an alarm system and remote locks, the current draw may be around 2-3 amps for a few minutes after you last close the door. This is normal. If you're not sure, wait at least 20 minutes after you last open or close a door before you take a reading.
10. If everything is normal, you will read less than 35 milli amps, or .035 amps. If the current drain is higher than that, you need to find out what is draining your batteries: You can start by pulling fuses until the load goes away. If that doesn't reduce the draw, you need to look for a wire that is corroded or frayed.

If you are drawing too much current in the system, the first steps would be to check engine compartment components. Disconnect the wire to the alternator to rule out diode back draw in the alternator itself. Then, disconnect the main engine cable connection to the electrical fuse blocks.

Disconnect all add-on components wired directly to the battery or positive main engine block terminals. Look for elimination of the excessive amperage draw, one item at a time. Disconnect the starter motor, check the draw.

Once the engine compartment is ruled out, you would need to go to the fuse boxes and pull each fuse one at a time - looking for correction of your excessive current draw on your meter...

Also remember to bear in mind what I mentioned re the modules on the car - that shut down after a few mins after shut off.. this can takes up to half an hour so be aware of that. If it never shows a reduction in draw - then one of the modules isn't shutting down - and that would need investigating further then.

Lastly - common faults are things like the boot light and glove box lights coming when the vehicle is left unattended... due to faulty switches - so you can even start by removing the bulbs on these...and seeing if the battery drain stops then - simple as that. If not -then you need to work through as above until you find the fault .

Kind Rgds, MIKE

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