Canbus aux socket voltage

[veefour]

Hi guys

Bought one of those niffty USB charging sockets and a canbus lead for the auxillary socket under the oil cooler (2010 GS). Before fitting the socket I thought I'd just check the voltage on the lead to make sure I'm in the right socket after reading another thread that says there's a diagnostic one near there (although I can't see it).

Anyway using wires 1 and 3 as per the dealers instructions I get good voltage on the multimeter when I put the ignition on which it holds for about 2 minutes when I turn it off. I thought I read somewhere it stays on longer than that? Also when it turns 'off' I'm still reading just over 1V on the meter - is that right?

Thanks in advance.

 

[veefour]

Well in the meantime I've taken a punt and fitted the socket in such a way that it can easily be removed.

Tried with with the iPhone - works a treat.

Tried it with my Garmin - and the bloody thing reckons it's connected to a computer! Bollox! It's a Garmin Nuvi car sat nav rather than a purpose made bike one as I only want to use it occasionally but clearly one of the pins on the USB lead tells it its connected to a computer rather than just a charger and whilst it's in that mode you can't use it as a sat nav.

When I toured Scotland last month I cannibalised a car charger and connected it directly to the battery but it bothered me it was always live and not protected from the elements when the sat nav wasn't on so I thought this would be a neater solution as it allows me to power any accessory that can be powered by USB (i.e 5V).

Any bright ideas (that preferably don't involve lots of cash!)?

 

[Deleted account 190920001]

there are 4 wires in a USB cable, the red and black are voltage and the othe two are data. To get your garmin to think it is connected to a charger short the two data wires together. Went through all this last year with my phone and finally worked it out.
Don't know if you know or not but a USB port on a computer is current limited so although it should charge it wont do it very quickly. Shorting the wires makes it think its on a charger so it charges at the full current. The proper chargers are shorted internally so you don't have to mess about with the leads.

 

[veefour]

there are 4 wires in a USB cable, the red and black are voltage and the othe two are data. To get your garmin to think it is connected to a charger short the two data wires together. Went through all this last year with my phone and finally worked it out.
Don't know if you know or not but a USB port on a computer is current limited so although it should charge it wont do it very quickly. Shorting the wires makes it think its on a charger so it charges at the full current. The proper chargers are shorted internally so you don't have to mess about with the leads.

Thanks for that. I read this on some other forums last night along with what looks like some tricky instructions on how to modify a lead and then on adventure rider there's a post about a site in the States that sell modified leads so I might contact them.

 

[vfxmark]

there are 4 wires in a USB cable, the red and black are voltage and the othe two are data. To get your garmin to think it is connected to a charger short the two data wires together. Went through all this last year with my phone and finally worked it out.
Don't know if you know or not but a USB port on a computer is current limited so although it should charge it wont do it very quickly. Shorting the wires makes it think its on a charger so it charges at the full current. The proper chargers are shorted internally so you don't have to mess about with the leads.

oooh, good to know on general principles!