What connection on fusebox is this

beanie

beanie

Active member
 Bournemouth/Turin
Hi all. I have a power drain in my Z4m and have traced the source to the plug circled below but i have no idea what it is. Checking the fuses revealed one that had a minor draw which was related to the screen and phone (bluetooth perhaps?) but once this fuse was removed the drain only dropped a little. Removing the crircled plug dropped the power drain to a normal level.

I'll have a trawl for diagrams later but until then if anyone knows where this goes to it would be most appreciated.

fuseboxz4-5.jpg


A little background on my issue incase it helps. I recently had an alpha-N remap on the car and since then the nav unit has been a little temperamental. Apparently the software was updated prior to the remap. If i drive the car everyday there is no problem starting it but if left for more than a few days the battery dies.

There is a fluctuating drain of 1.3-2.6A and this is only resolved by removing this plug. I'm at a bit of a loss with electrics so would appreciate any guidance as understandably, i'm a little pissed at having to do this after work was carried out. Before anyone suggests going back to the place i am about 850 miles away in italy so it's not really feasible!

thanks
 
Qiuck bump for any thoughts or advice on where to look or even any good sources for wiring diagrams.

My dad popped in to the local bmw dealership to ask about wiring diagrams only to be fobbed off with 'depends on what is fitted, sir'.

At the moment I'm not sure the reason for the drain but I am currently of the opinion something with the software update has left the nav/Bluetooth in a state of limbo as fuse 49 is the only one that makes a difference. It's something I've found on my searching that's happened to one or two others so fingers crossed its purely a glitch rather than a wired-in issue.
 
That looks like it may be useful, thanks! I'll have a good trawl through it when I get a moment.
 
It's the X13020 to X10209 loom. Right now I don't have access to WDS, which would tell where X10209 connector is. Anyone?
 
DMike said:
It's the X13020 to X10209 loom. Right now I don't have access to WDS, which would tell where X10209 connector is. Anyone?
Click to expand...

Nope, X10458 it is. Sorry, had google as my only resource.
 
Thanks for that Mike, I'll plough on with some googling this weekend.

As an update, the nav unit has been a bit clunky the last few starts. It always used to make a light noise as it initiated (key to pos 2) but sometimes now it seems to make a bit of a fuss so I'm sure there is something amiss here. Ive been unplugging the battery each time I've used it but decided to leave it for a while one day at work and the battery didn't lose any charge....I'm hoping for an electrical miracle that cures itself after a good bout of plugging and unplugging!
 
Looked up X10458 in WDS. It connects from power distribution (fuses F47 and F50) to X18126 on N9, i.e. the radio. Complete path to the diagram is E85/complete vehicle/body/audio video and navigation/radio/voltage supply/radio supply.
 
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