How to replace Fuse 48?

Hi All,

I mistakenly pulled out trunk fuse 48 yesterday and now when I put it back my car just starts squealing a very high pitch solid tone. I have pressed the buttons, started her, but still the squealing persists. How do I re-insert fuse 48 without this happening, because right now my alarm system is not working?

I had the same problem. Just put it in and wait about 30sec. It should stop. In my case, I had a bad battery. Once I put in a new one, the problem went away. Hope that helps.

I've never pulled fuse 48, but one of the parasitic drain diagnostic procedures is to pull fuses one by one to check current drain, so, if the steps for pulling fuse 48 are different than the rest, let us know so we can modify the diagnostic procedure.


See also:
BMW_EWS_Drive_Away_Protection_Alarm_System.pdf (709.3 KB, 284 views)

EDIT:
Doing a basic search for "fuse 48", I find some interesting quotes:

Originally Posted by Bigset3102

i found that if you pull fuse 48 in trunk it disables alarm while keeping locking system working. if your alarm doesnt go off when you pull fuse 48 then the rechargable batteries in your siren are bad and supposedly if you replace those everything will work again

Some other tidbits on what happens when you pull fuse F48:

Originally Posted by Belicek

Fuse 48 being unplugged does NOT disarm the security system; just the siren, lights will still flash if the alarm is activated.

Originally Posted by txtigr

I removed fuse 48 from the trunk fuse panel, and even though siren would not sound, lights would still flash while alarm was going off at random..

Originally Posted by Wolfey

remove the anti-theft alarm fuse. The fuse is located inside the passenger side trunk wheel well area, a 5 amp fuse #48. This will disable the alarm, but it will still allow you to lock and unlock the car, both manually and with the key remote. No whistle will accompany locking or unlocking, but the lights will still flash.