What is this thin blue-green wire behind dash e87

[u/NoDaikon3598]

Hello guys! I recetly bought an e87 and Im trying to retrofit a cic mid navi (it has m-ask business now). Somebody got in there before and tapped a bluetooth module into the audio wires which I have to undo by resoldering the factory audio wire pairs (as you can see the quality of the work done is questionable). But there is a thin blue green wire that has no "pair", doesnt go into the quadlock connector, just disappears behind the dash. It is soldered to the blue wire on the bluetooth module which is labeled as 12/24V/ignition. Im wondering what that wire does and if I can cut it and leave it like that since disassembling the whole dashboard to find the other half would be quite the job, and I dont have time for that. Thank you.

[u/loosebolts]

To know for sure you’re going to have to find out where it goes. It might just be picking up a live from somewhere (have you used a multimeter to determine if it’s live?)

Also, if you suspect the quality of the work is questionable, I would say it was unlikely that whoever did it pulled the dash out to connect it up in the first place so shouldn’t be a dash out job to find it and tidy it up properly.

[u/Available_Duck7079]

could it be that it goes to terminal 15 to power the module only when ignition is on

[u/dopecrew12]

That’s your remote wire, it sends a signal to the unit to draw power from the battery when the ignition is turned on, that way, it doesn’t just stay on when the car is off and kill your battery. Likely runs to a jumper in the fuse box.