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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
On Thu, 14 Mar 2013 06:18:22 -0700, wrote:
> Instead of using decent wire suited to the application, > the Europeans chose to use some green hippie wire, > that not only costs more, but fails..... Maybe. But why does it always fail at the same spot. That can't be due to the poor choice of insulation, can it? |
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
Bimmer Owner > wrote:
>On Thu, 14 Mar 2013 06:18:22 -0700, wrote: >> Instead of using decent wire suited to the application, >> the Europeans chose to use some green hippie wire, >> that not only costs more, but fails..... > >Maybe. But why does it always fail at the same spot. Because if you make a loop and you open and close it over and over again, it will fail in the center of the loop where the angle of the movement is greatest. >That can't be due to the poor choice of insulation, can it? No, as you'll notice the conductors are breaking too, not just the wire. So it's a poor choice of insulation AND stranding. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
On 03/14/2013 08:23 AM, Scott Dorsey wrote:
> Bimmer Owner > wrote: >> On Thu, 14 Mar 2013 06:18:22 -0700, wrote: >>> Instead of using decent wire suited to the application, >>> the Europeans chose to use some green hippie wire, >>> that not only costs more, but fails..... >> >> Maybe. But why does it always fail at the same spot. > > Because if you make a loop and you open and close it over and over again, > it will fail in the center of the loop where the angle of the movement is > greatest. > >> That can't be due to the poor choice of insulation, can it? > > No, as you'll notice the conductors are breaking too, not just the wire. > So it's a poor choice of insulation AND stranding. respectfully and completely disagree on that. the stranding is perfectly fine if the insulation remains intact. once the insulation cracks, then you have substantial strain concentrated in just one spot. even fine wire high count stranding will break if subject to such a failure. the fix is both better wire insulation that doesn't become brittle, AND re-routing to avoid the elbow bend. then you can keep using cheap wire and don't need to spend money on the expensive hi-flex stuff. -- fact check required |
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What is the root of this BMW design flaw in all 3,5,7 series BMWtrunk wiring looms?
> > the fix is both better wire insulation that doesn't become brittle, AND > re-routing to avoid the elbow bend. *then you can keep using cheap wire > and don't need to spend money on the expensive hi-flex stuff. > > -- i had the exact same thing happen in the rear door wiring in a 95 toyota camry. Mark |
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What is the root of this BMW design flaw in all 3,5,7 series BMWtrunk wiring looms?
On Mar 14, 10:54*am, Bimmer Owner > wrote:
> On Thu, 14 Mar 2013 06:18:22 -0700, wrote: > > Instead of using decent wire suited to the application, > > the Europeans chose to use some green hippie wire, > > that not only costs more, but fails..... > > Maybe. But why does it always fail at the same spot. > > That can't be due to the poor choice of insulation, can it? Of course it can be. If BMW uses some hippie green insulation that isn't as pliable as other insulation, then the insulation will crack. We can't do a forensic investigation from some pics that don't show how it's mounted, how much it moves, what tensions are on it, etc. But I'd bet that area has more bending, tension, etc than the rest of it. |
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
On 3/14/2013 11:34 AM, Mark wrote:
> >> >> the fix is both better wire insulation that doesn't become brittle, AND >> re-routing to avoid the elbow bend. then you can keep using cheap wire >> and don't need to spend money on the expensive hi-flex stuff. >> >> -- > > > i had the exact same thing happen in the rear door wiring in a 95 > toyota camry. > > Mark Ya, how many "door handles" have broke on you? I'm up to 6 on 4 vehicles, 4 inside and 2 outside. I haven't rewarded them for their poor build. I drill and epoxy two steel pins on the inside handles and put two stainless steel flat head screws in the outside handles. Haven't had any repairs break. I'd almost recommend my outside door handle repair as preventative. Mikek If you're going to blame me for being rough on door handles, I'll have to say it must be hereditary and spread by marriage. All 4 in my family has broke one and my son-in-law. |
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What is the root of this BMW design flaw in all 3,5,7 series BMWtrunk wiring looms?
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> > > i had the exact same thing happen in the rear door wiring in a 95 > > toyota camry. > > > Mark > > * *Ya, how many "door handles" have broke on you? snip my wife broke the inside passenger side.. i've learned to use only two fingers to pull on the handles, don't grab them. i agree they are not very rugged... but it's about the only flaw i've found with that car (knock knock) besides the rear door wires which i understand like the BMW is a very common spot for wires to break on this car... and interestingly the rear door is used maybe 1/100 of the time compared to the drivers door so you would have to think there is something "special" about the way those particular wires are designed and/or built to make them break before the drivers door wires break Mark |
#9
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What is the root of this BMW design flaw in all 3,5,7 seriesBMW trunk wiring looms?
On 3/15/2013 5:36 PM, Mark wrote:
> - >> >>> i had the exact same thing happen in the rear door wiring in a 95 >>> toyota camry. >> >>> Mark >> >> Ya, how many "door handles" have broke on you? > > snip > > my wife broke the inside passenger side.. > > i've learned to use only two fingers to pull on the handles, don't > grab them. > > i agree they are not very rugged... > but it's about the only flaw i've found with that car (knock knock) The inside handles seem to be designed to break at the 8 to 10 year mark. The have a slot molded in to the highest stress point, I might add I don't see any reason for it. Other than to help the dealer sell replacement handles. Other than the door handles I'm a happy Toyota owner, had a Camry, have a T-100 still a sharp looking truck, have a Lexus and an Avalon. My wife is a persistent patient shopper, and will wait until she finds a great used car at a steal. Mikek |
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