BMW M5 Forum and M6 Forums banner
1 - 1 of 1 Posts

·
Moderator Emeritus
Joined
·
2,977 Posts
No that is not normal. The dealer is BS-ing you.

How did they perform the drain test?

There are two methods, one of which works:

A. Disconnect battery. Connect mA current meter eletrically between battery and car. Read total current out of battery.

B. Don´t touch the battery connections. Clamp a magnetic current sensor
around one of the battery cables. Read total current out of battery.
Then proceed to clamp the sensor around individual wires at the fuse-panels until the culprit load is found.

Method A is useless, as it will cause a reset of all electronics. When the current drain is too big it is usually because of an error that will disappear for a while after such a reset, only to re-appear later.

Method B is highly effective, as it will not upset the malfunctioning electronics, and it will pinpoint the problem.

David
 
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top