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Discussion Starter #1
I've had an annoying power drain for ages now. Seems like this has destroyed my second battery now so I've got back to investigating it.

I finally sat in the cab long enough for things to shutdown and then started pulling fuses. Finally found a big drop in current draw from 250mA to <20mA with the removal of: 33.(15A) Audio unit, Navigation system, Traffic information control module.

Removing the radio unit and replacing this fuse shows the current draw back up at 150mA. This still seems way too high to me.

How can I find what else is on this circuit? It's not like there's anything I can turn off. The only thing I can think of is that there's a bluetooth unit and a hands-free microphone installed which I have no idea where the cables run to (can't see them in the radio mounting slot). There is a GPS reciever but unless there's another one hidden somewhere that came with the new radio I fitted and only connects to the radio itself.
 
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