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#1
05-22-2007, 03:30 AM
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Where do I connect the ground wire in the fuse box?
I found a fuse to connect it to but where do I connect the ground wire? I was told to look for a black bolt or screw. I do not see it anywhere. Anyone know where it is located? What does it exactly look like? 
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#2
05-22-2007, 03:53 AM
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no idea, but with what I have wired in my X5 brown wire has ment ground.
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2002 4.6is Dinan S2 Titanium Silver/Black Alcantara DINAN Stage 4 Engine Software Automatic Transmission Software High FlowThrottle Body Free Flow Exhaust Cold Air Intake System High Flow Air Mass Meter OTHER CCFL Angel Eyes Stealth XM Radio in ashtray : FM Mod Pilot H3 Fog Bulbs Cleared Headlights: Hi/Lo Beams Hardwired Radar Detector IN PROGRESS Powerstop C/D Rotors: (on backorder) W/EBC Red Stuff (F) W/Axxis Deluxe (R) Dice Ipod: Aux Input for XM THINKING SMG II MK4 Bluetooth
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#3
05-22-2007, 10:20 AM
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I am not sure if I understand the question right - ground is ground, it is a metal part of a car that acts as a common plane for all the other electrical components. In other words, if you take an Ohm-meter, and put one end to the negative terminal of the battery and the other probe anywhere on the unpainted metal body of the car, you would have "zero" resistance. So, any metal screw, bolt or a nut that makes "naked" electrical contact with the body of the car should suffice. As a mater of fact, same Ohm-meter will allow you to determine if the desired bare metal part is connected to "ground" by checking the resistance between the desired spot and other known good ground, say, one of the nuts under the hood that hold the front shocks...
The power source for the Nav unit is a different story - you want to tap into "switched" positive power supply, that is "hot" when the ignition key is a position other than when a car is parked away. You don't want to have the battery drained while you are on a two-day business trip somewhere and your nav unit is powered all that time. Also, when you tap into a "switched" power line, you have to make sure that the additional load of the new appliance does not hinder the operation of the "native" device that is fed by that power wire. Otherwise, you might need to use a relay, to provide the unswitched power triggered by the "switched" weak wire... I am not sure if my rambling made any sense... lol...  my two cents...
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E53 X5 4.6iS 147K mi - Sold May 2013 Tireprints left in: USA, Nicaragua, Costa Rica, Panama, Russia  E53 X5 4.8iS built 2005-10-17 66200 mi - June 2012 96000 mi - June 2013 112000 mi - June 2014 OEM fire extinguisher OE first aid kit OE tow hitch OE TV module OE aspheric mirror K&N air filter black/white badges rear camera 4-channel video recorder Here is the list of things I have done to the X
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