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Old 04-28-2012, 08:27 AM   #16
tedder
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Quote:
Originally Posted by S2P View Post
Ok but just because it has a usb end doesn't make it a usb cable. If it was a power cord for a 12v system you should be able to shorten it to your desired length. That is why I asked what it looked like inside.
Apparently it's too hard to give us more information so we can solve his problem for him.
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Old 04-28-2012, 09:42 AM   #17
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Yep, the positive wires usually are more upbeat.
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Old 04-28-2012, 10:22 AM   #18
GH41
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Quote:
Originally Posted by Flashmo View Post
Don't hardwire that USB cable from your GPS to your bike. USB cables are for a 5 volt systems, you will ruin your GPS the first time you try to put power to it.
It depends on what GPS unit you have. Some will handle as much as 36 volts but other will fry if fed more than 5! Many power cables house the voltage reducer in the lighter plug but it could be anwhere on the cord. GH
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Old 04-28-2012, 10:23 AM   #19
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was there a cig plug on the utter end of the power cord?. if so there's a fairly recent thread about cutting off the cig plug and the problems that ensue (spelling police please take note- your powers are weak)
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Old 04-28-2012, 06:41 PM   #20
tedder
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Quote:
Originally Posted by GH41 View Post
It depends on what GPS unit you have. Some will handle as much as 36 volts but other will fry if fed more than 5! Many power cables house the voltage reducer in the lighter plug but it could be anwhere on the cord. GH
Not if they are USB cables, bubba.
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Old 04-30-2012, 09:04 AM   #21
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Laugh

Quote:
Originally Posted by medic View Post
negative wires just never have anything nice to say.
best first reply ever!!!!
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Old 04-30-2012, 05:37 PM   #22
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Go buy a new cable. Don't fuck with it unless you absolutely know what you're doing.
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Old 05-02-2012, 07:30 PM   #23
FlySniper
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I'm kinda' surprized that no one has mentioned USB cables have two negative leads and come in two different flavors...

Some have the shielding grounded to the negative and in some they are separate. For my Delorme GPS it makes a difference, shorted leads=power only, unshorted = power+data.
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Old 05-03-2012, 12:09 PM   #24
Beezer
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it ain't rocket surgery... use the magic phrase "pinout" in your search...

example:

http://pinouts.ru/GPS/garmin_nuvi_power_pinout.shtml
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Old 05-03-2012, 12:14 PM   #25
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Two words: volt meter.
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Old 05-03-2012, 12:32 PM   #26
tedder
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Quote:
Originally Posted by jkersh1 View Post
Two words: volt meter.
So he's hooking a DC-DC converter or regulator with a USB cable up to power. A voltmeter will help on the supply side, but does nothing on the cable side unless you hook it up.

Plug the GPS in, put a voltmeter on the loose ends, all you'll get is noise.
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