Hello,
Not too sure why you would not want a rear wiper, but I have a simple answer for a simple question... You can remove the V12-Rear wiper motor fuse, SB52 (15A), located in the SB fuse box on the left side of the dash.
The J519 looks like it is in control of the V12, so after you remove the fuse, check the fault codes in the [09-Cent. Elect.]. If there is a fault code please post a complete
Auto-Scan of the vehicle in question.
Hope this helps,
drpeter