AberdeenAngus
Registered user
Another related battery charging question. This might sound silly, but does the ignition have to be on in order to charge the battery. I have just acquired a 2002 1150GS and the charging light on the battery charger will only show when the ignition is on - suggesting that the accessory socket is isolated from the battery when switched off.
On the other hand it could be something to do with the charger I'm using. I have a good BMW one back in France, but we thought we could make do with a very basic model until we get home. May be not?!
If you are clipping onto something that is only live when the ignition is on, then yes, you need the ignition on. This is not a good way to charge the battery.
A bog standard charger will work. Just connect straight to the battery. Don't need ignition on. Don't need to disconnect the battery or anything from it.


) this makes the starter sluggish to turn and will eventually fail. I'm not sure how your shop diagnosed the solenoid problem and whether the magnet fault could be misinterpreted as a solenoid issue but this is something to check. Again, any 'traditional' auto electrician will be able to tell you about this.