Hi,

I am trying to trace the source of a battery drain on my Defender 90 TD5.

I have checked all of the fuses for current draw when everything is switched off.

None of the fuses behind the gear stick registered any current drain, so I went to test the fuses under the drivers seat and 2 of these were registering a current draw.

The first was the 30A fuse with the engine symbol (the 20A fuse with the engine symbol did not register any current draw) which was drawing about 0.5 amps.

The second was the 20A fuse with the door and key symbol, this was only drawing about 0.02 amps.

So my question is are these current draws normal, or could one of these be the cause of my battery drain??

Secondly does anyone know what the 30A fuse is connected to? I am starting to wonder if this could be to do with the Alternator??

Any help would be appreciated as I'm not great with all this electrickery.

Ok just found a fuse box diagram:

Land Rover Workshop Manuals - TD5 Defender - UNDER SEAT FUSE BOX FROM 02MY

Fuse 9 is the 30A fuse which is drawing 0.5A - this is show as 'Main Fuse' so doesn't realy help much

Fuse 7 is the 20A fuse which is drawing 0.02A - Central Locking

OK I have removed the cable on the top of the alternator, but the current drain is still present with this disconnected.

Does this mean that I can eliminate the alternator, or do I have to also remove those 2 small wires (multiplug) at the back of the alternator which are impossible to get to???

Is it the alarm/immobiliser? These were known to cause battery drain, and why Land Rover changed the model.

No I have checked the alarm/immobiliser, defo not that .......

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