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#1
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Battery disconnect
Thanks, drs
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2003 X5 4.4 sport, nav, premium, cold weather, rear climate, PDC, rear air bags, sliding load floor, xenons.... |
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#2
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There is no battery disconnect under the hood. The negative (ground) connect is under the spare tire in the rear. Generally, to remove power one disconnects the positive terminal. Why do you want to disconnect the negative?
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2013 X5 3.5i M Sport 2004 M3 cabriolet SMG |
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#3
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That’s the way I was taught by a mechanic to disconnect/reconnect a battery. Negative off first, on last, no sparks.
Thanks, drs
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2003 X5 4.4 sport, nav, premium, cold weather, rear climate, PDC, rear air bags, sliding load floor, xenons.... |
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#4
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drs..... you are correct!
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#5
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When working on a car, I generally disconnect the positive terminal to avoid any sparks. If you just disconnected the negative, you would still draw a spark to ground as the positive is still alive throughout the car. As for removing the negative first, I can't see how that would draw less of a spark?
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2013 X5 3.5i M Sport 2004 M3 cabriolet SMG |
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#6
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Quote:
Assume a negative-ground vehicle (which is a pretty safe assumption, these days): 1) If you remove the positive cable first, while you are loosening the positive terminal your wrench may contact the chassis and draw a spark. Once the cable is off, you are clear. 2) If you remove the negative cable first, there is no danger if your wrench results in a short to ground, since the cable is grounded in any case. Once the cable is fully removed, you are clear.
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
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#7
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Quote:
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2022 X6///M - Toronto Red, Silverstone Full Merino Leather, Executive Package w/Remote Engine Start, Soft-close doors, Heated & Cooled Cupholders, Front Ventilated Seats, Front & Rear Heated Seats, Front Massaging Seats, Carbon Fiber Trim. 2002 X5 3.0i, Sport Premium, Titanium Silver, Grey Dakota, Cold Weather Pkg, Xenons, DICE, LED Tails, just a winter vehicle... 2007 550i, Sport Premium, Silver Grey Metallic, Grey Dakota, Nav, Cold Weather Pkg, Comfort Access, HD Radio, Xenons. |
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#8
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Hi
I have been an electrican for over 20 years now and you always remove the neg first. When I'm lazy and remove the B+ first its always on the back of your mine not to short out the spanner or wrench. NEG first always. I have never seen sparks disconnecting B+ or NEG unless your running a CAP for the sound system, well that is another story. Bourdo
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