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  #1  
Old 02-25-2017, 11:32 AM
ludwig120 ludwig120 is offline
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DIY USB outlet

Recently purchased 2011 K1300s bike.
Upon opening the battery cover have discovered an unprovided USB outlet which is connected to the bike’s wiring system.
Anybody knows what was the original equipment connected to this black/white connector?
There are 3 wires coming out from the white side, any idea whet they might be?
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  #2  
Old 02-25-2017, 12:29 PM
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Re: DIY USB outlet

The three wires are plus, ground and pulse. Check topics about connecting gps navigation devices. The connector voltage is NOT 5 volt but 12 volt!
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Old 02-25-2017, 12:45 PM
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Re: DIY USB outlet

It's the connector for the BMW sat nav. Three wires - pin 1 earth, pin 2 speed-pulse (don't connect to anything other than the BMW GPS), pin 3 - switched 12v.
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Old 02-25-2017, 07:13 PM
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Re: DIY USB outlet

I just ordered that factory connector, and plan on useing the switched 12v power to activate my new Denali lights! I like this idea so I won't have to splice into the wiring harness. This was recommended by Beech! I think it's a great idea! Just don't connect a phone charger to it, for it will drain the bikes battery, a warning from Beech!
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Old 02-25-2017, 08:10 PM
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Re: DIY USB outlet

Quote:
Originally Posted by rs530
I just ordered that factory connector, and plan on useing the switched 12v power to activate my new Denali lights! I like this idea so I won't have to splice into the wiring harness. This was recommended by Beech! I think it's a great idea! Just don't connect a phone charger to it, for it will drain the bikes battery, a warning from Beech!

if it is switched....how would a phone charger drain the battery? key off, charger off....
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Old 02-25-2017, 09:20 PM
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Re: DIY USB outlet

I asked Beech the same question! Hopefully he'll chime in soon and explain it!! As he explained it too me. I value his advice!!
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Old 02-26-2017, 05:23 AM
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Re: DIY USB outlet

Quote:
Originally Posted by mlytle
if it is switched....how would a phone charger drain the battery? key off, charger off....
Not so. The 12 v to 5 volt converter can make the vehicle computer think there is still a device active. So the complete circuit stays live (including abs sensors etc.) draining the battery in appr. 5 days.
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Old 02-26-2017, 06:35 AM
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Re: DIY USB outlet

Quote:
Not so. The 12 v to 5 volt converter can make the vehicle computer think there is still a device active. So the complete circuit stays live (including abs sensors etc.) draining the battery in appr. 5 days.

'tis true. I thought it odd, so just went out to try it. It seems switched live here only relates to off-to-on and not vice versa.
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Old 02-26-2017, 09:47 AM
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Re: DIY USB outlet

so if there is any load on that plug, the power stays on after key is turned off? GPS? relay for lights?
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Old 02-26-2017, 04:40 PM
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Re: DIY USB outlet

It does seem that way, though the sat nav does some how detect when you've switched off and prompts you if you want to continue on battery power. Drop in voltage perhaps?
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Old 02-26-2017, 04:47 PM
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Re: DIY USB outlet

I have a 3BR USB port wired up to the GPS plug. On my bike it stays on for 60 seconds after ignition shutoff. Which is as documented by BMW. I have no problems with battery drain. My bike sat from September to February with no battery tender and it started right up. Also, I have had my phone plugged in and it still shuts off after 60 seconds.
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Old 02-26-2017, 07:25 PM
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Re: DIY USB outlet

Quote:
Originally Posted by mlytle
if it is switched....how would a phone charger drain the battery? key off, charger off....
I power the radar detector and GPS from this connection. They power off with the switch.
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Old 02-27-2017, 12:46 AM
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Re: DIY USB outlet

The cut off seems to be right on the edge, different results from different bikes. The connector goes off after 60 seconds. But certain DC to DC converters manage to keep things going on some level that causes trouble. The BMW Garman Nav GPS's turn off the port when you turn off the GPS. It does make a good trigger wire for a relay to power up either a fuse panel or a light system as one of the posters is wiring up as we type. I use it to fire up my vintage AP2 panel.
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Old 02-27-2017, 08:14 AM
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Re: DIY USB outlet

Quote:
Originally Posted by cstumpf750
I have a 3BR USB port wired up to the GPS plug. On my bike it stays on for 60 seconds after ignition shutoff. Which is as documented by BMW. I have no problems with battery drain. My bike sat from September to February with no battery tender and it started right up. Also, I have had my phone plugged in and it still shuts off after 60 seconds.

Like I said: with a converter or bunched up surplus wiring, the system can be made to think something is still operating so it won't shut down. (Beech: Different results from different bikes.)

I wouldn't be surprised if BMW navs (and battery chargers) somehow communicate with the bike's ZFE so the swich off after 60 seconds will function the correct way.
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Old 02-27-2017, 04:22 PM
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Re: DIY USB outlet

I have my heated seat powered from the aforementioned plug, and if the seat is operated at 'hot' setting, it cuts off power 60 secs after ignition off (seat left turned on)
But if I have the seat at 'Low' setting, the power is cut after 15 seconds.
The cut-off period seems to be affected depending on the load.?
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Old 02-28-2017, 04:18 AM
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Re: DIY USB outlet

If you don't want the risk of a dead battery, I guess the bottom line is to not use the bike's power outlets when using non-BMW items, but to connect them directly to the battery or to a non-ZFE controlled part of the wiring. (The small christmas tree bulb in the headlight?)
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Old 02-28-2017, 02:03 PM
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Re: DIY USB outlet

Quote:
Originally Posted by henkpenk
If you don't want the risk of a dead battery, I guess the bottom line is to not use the bike's power outlets when using non-BMW items, but to connect them directly to the battery or to a non-ZFE controlled part of the wiring. (The small christmas tree bulb in the headlight?)

Connecting directly to the battery increases the risk of a dead battery if the above logic is used.
You've at least a chance of the bikes power outlets cutting the power after a certain time if you inadvertently leave something powered up, but no chance if connected directly to the battery.
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Old 02-28-2017, 05:35 PM
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Re: DIY USB outlet

Separate fuse panel fired off by a relay, to isolate all this stuff
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Old 02-28-2017, 07:44 PM
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Re: DIY USB outlet

I put my new Denali lights on by using the BMW accessorie plug! I really like the idea of them staying on for a minute after I shut the bike off, not that I really ride at night, just think I'll like the fact that it will light up the area as I'm walking away. Thank you Beech for the great suggestion

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Old 02-28-2017, 08:29 PM
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Re: DIY USB outlet

A couple more pictures, these should get the attention of oncoming traffic

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Old 02-28-2017, 08:32 PM
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Re: DIY USB outlet

http://www.i-bmw.com/gallery/data/50...21331.JPG?9863
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Old 03-01-2017, 07:43 AM
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Re: DIY USB outlet

Quote:
Originally Posted by panason1c
Connecting directly to the battery increases the risk of a dead battery if the above logic is used.
You've at least a chance of the bikes power outlets cutting the power after a certain time if you inadvertently leave something powered up, but no chance if connected directly to the battery.

I agree of course but there's more to it. Using the bike's outlet makes you think all is well but in reality not only the 12 to 5 volt converter stays active but a lot of other stuff. Enough to give you a nasty surprise within a few days.
A small converter like the one used for a nav or a USB port, connected directly to the battery (but without the nav) will take many weeks to drain a healthy battery.

So the best solution is checking things with a mulit meter to see if the system works as advertised or stays active after switching off
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Old 03-01-2017, 12:29 PM
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Re: DIY USB outlet

Turn everything off and let everything settle down. Place an amp / milliamp meter in line at the positive battery terminal. Any reading other than zero will mean a dead battery at some point in the future.
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Old 03-01-2017, 12:34 PM
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Re: DIY USB outlet

Messing with the electrics, just a caution note, do not ever dis connect or re connect the battery with the key on.
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Old 03-01-2017, 05:14 PM
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Re: DIY USB outlet

Not planning on doing so, but out of curiosity... what happens if you do?
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Old 03-01-2017, 06:02 PM
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Re: DIY USB outlet

Voltage spikes can mess with the computer as its circuits are now exposed with the key on. Article I read mentioned killing the fuel pump circuit as it is on right away with the key.
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Old 03-02-2017, 02:48 AM
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Re: DIY USB outlet

yesterday I mounted some extra led lights on my k1200r, they are connected to the aux canbus. after switching of the power the lights will stay on for 60 seconds.
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Old 09-26-2017, 08:28 AM
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Re: DIY USB outlet

Quote:
Originally Posted by henkpenk
Not so. The 12 v to 5 volt converter can make the vehicle computer think there is still a device active. So the complete circuit stays live (including abs sensors etc.) draining the battery in appr. 5 days.

Aha! I'm new here and digging up useful topic threads. The above statement explains why my F800 battery flatlined earlier this year: had a Powerlet 12 to 5 VDC USB converter plugged into factory power socket when bike was parked at end of weekend trip. I didn't know that (early) CAN-BUS bikes might sense the current draw from DC-DC converter and keep the system hot. Thanks for the knowledge.
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