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Thread: Anyone have a clue?
02-26-2005 02:52 PM #1
Anyone have a clue?
as to what the small wire, that's on the positive terminal of the battery is? It is connected into the terminal with the main battery cable. It is loose on my 2001 3.0i Z3. I have some issues with the rear mounted disc changer that indicate intermittent loss of power.
I haven't figured out what the wires purpose is or how it is actually secured to the cable terminal but it is not tight and moves easily.
I thought it may have just plugged in to the cable clamp but not sure.
How does the plastic cable clamp come apart?
any help appreciated
02-26-2005 03:27 PM #2
02-26-2005 03:44 PM #3
Re: Could be an auxiliary item...
No fuses nearby. It is a black wire with a yellow connector. It is original equipment.Really wish to know how it is fastened to the "+" cable connector as it is very loose. Can't figure out the black plastic cover over the cable that hides this wires attachment. Looks as though the cover it a two piece, snap together design, but hate to mess it up just randomly prying on it.
02-26-2005 03:56 PM #4
- Washington, DC, United StatesMember No: 31591
- Join Date
- Mar 2002
- Rep Power
I think our cars have an integrated inertial battery disconnect built into the positive terminal clamp assembly. When a certain g load threshold is exceeded in an accident, the battery is effectively automatically disconnected. I think the part then has to be replaced to effectively reconnect the battery. However, in the event of an accident, the emergency blinkers are automatically activated and the doors unlocked. Probably some other stuff too.
I'm guessing this aux wire powers these post accident features, and thus need to circumvent the battery disconnect.
06-16-2010 09:36 PM #5
Re: Anyone have a clue?
The link is for the Z3 wiring diagram which shows one thick red lead 50RT going from the battery to the Battery Safety Terminal then on to the Jump Start Connection Point then to the Starter and Generator.
The other smaller red lead 25RT going from the battery to Fuse 100 and then to the power distribution panel.
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