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#12
10-11-2016, 10:11 AM
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Had to head out of town for the weekend to visit a family so I haven't been able to get underneath it to further inspect and instead disconnected the battery just in case.
No one has any ideas or has heard anything like it? I'm sure I'll track it down just if anyone has experienced anything similar it may make the process quicker. 
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#13
10-11-2016, 02:59 PM
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Sounds to me like a faint version of the warning sound that the key is in the ignition.
__________________
 X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interiorDallas
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#14
10-11-2016, 08:12 PM
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So I pulled the undertray and proceeded to try to one by one disconnect harnesses in order to make the sound go away and diagnose it. Voltage regulator, transmission harness, fan harnesses, etc, nothing.
Then I went to the fuse box in the glove box and one by one disconnected fuses. Fuse 41, rain sensor made it go away. The headliner is out as I've been sealing the sunroof. I'm still at a loss as to where the sound is coming from but it has to do with that fuse. Very odd
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#15
01-06-2019, 10:19 AM
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Found the sound
Hi
I found the source of the siren sound. When you have the Servitronic steering, there is a valve on the steeringrack. I suppose it is nothing to do with it. I changed the steering, and the sound was there before and after.
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#16
01-06-2019, 12:37 PM
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My truck also exhibits the faint alarm sound. I believe it's normal as I've seen enough e53's and e39's with the same behavior.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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#17
01-06-2019, 08:57 PM
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Quote:
__________________
Current stable: 2005 LMB X5 4.8is, 2000 LMB M5, 2004 JB M3 6spd coupe
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#18
01-07-2019, 12:48 PM
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I don't and never have had a siren sound and I have had a hearing test though a few years ago.
I know of no reason that the steering would be linked to the rain sensor but I suppose it could be. There might be something else on the same circuit as the rain sensor that would be identified in the fuse box. Have you tried using an auto stethoscope to pinpoint the source?
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interiorDallas
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#19
01-07-2019, 02:14 PM
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The Bentley Manual says fuse 41 (5 amp) is general module and rear wiper control.
It looks like fuse 10 (15 amp, horn relay) is directly across from that.
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) Last edited by 80stech; 01-07-2019 at 02:19 PM. Reason: add
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