When it came time to install the driving light relay and AutoSwitch, I began to look for the most convenient location where they would be easily accessed and out of the elements. The choice was simple; the BMW Fuse and Relay Box and for more reasons than those just mentioned. Read on!
The AutoSwitch required two connections where tapping into the BMW factory wiring was necessary. Tapping into factory wiring isn't my style, so I came up with a solution. Instead of tapping into the turn signal cancel wire somewhere in the wire harness, why not perform a non-destructive tap at the BMW Turn Signal Relay within the BMW Fuse & Relay box. The switched power for the AutoSwitch is discussed further down.
After removing the BMW Turn Signal Relay from the fuse box (talk about an over engineered connector), I removed the cover from the relay.
The 4th pin from the left, top row, is where I tapped into. The wire was then looped through a groove in the base plate after the thin plastic was cut out.