Author Topic: Car satnav - replacing charging cable  (Read 1071 times)

Car satnav - replacing charging cable
« on: September 14, 2015, 07:13:07 pm »
I know there are some people on the forum who really understand USB!

The cable for our Garmin is attached at one end to the 12V plug. The other is a right-angled USB (one of the smaller ones).
We don't mount the device on the windscreen, instead we have a weighted mat which sits on the dashboard with a mount on that. Unfortunately, this puts a strain on the usb plug with the result that it is now intermittently failing. I'd like to replace the cable for one with a straight plug which would fit much better.
Can I use one of those USB sockets which plug into the 12V supply, then an ordinary USB cable? Or will that sort of USB socket not provide enough current to drive the satnav?

TIA

Steve
"No matter how slow you go, you're still lapping everybody on the couch."

Kim

  • Timelord
Re: Car satnav - replacing charging cable
« Reply #1 on: September 14, 2015, 07:30:13 pm »
Can I use one of those USB sockets which plug into the 12V supply, then an ordinary USB cable?

I expect so, unless it's doing something exotic with the signalling.  Check the satnav runs from J Random Phone Charger first.


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Or will that sort of USB socket not provide enough current to drive the satnav?

Pick one of an appropriate current rating (I can't imagine a satnav needs more than an amp), and it ought to be fine.
To ride the Windcheetah, first, you must embrace the cantilever...

Feanor

  • It's mostly downhill from here.
Re: Car satnav - replacing charging cable
« Reply #2 on: September 14, 2015, 08:36:27 pm »
I have an original Garmin in-car charger of this type which is going spare.
It was used with my now-defunct Colorado 300.

It looks identical to this one:
http://www.ebay.co.uk/itm/Garmin-USB-Car-Charger-for-GPS-SAT-Nav-etc-320-00239-24-/151771864901?hash=item23564edf45

The Garmin p/n is 320-00239-22
I/P = 10 - 30v DC
OP = 4.9 - 5.25v DC 1A.

I can send it to you FoC if you like, just PM me an address.


ETA: Oh, I just saw you wanted one with a straight plug.  Nevermind.


Re: Car satnav - replacing charging cable
« Reply #3 on: September 15, 2015, 07:18:21 am »
You could lash up something with a petrol injector circuit 6 ohm ballast resistor from a 1974 Jaguar XJ12.

Or a 6 Ohm, 25 Watt ceramic case wire wound resistor from RS.

Kim

  • Timelord
Re: Car satnav - replacing charging cable
« Reply #4 on: September 15, 2015, 01:03:55 pm »
You could lash up something with a petrol injector circuit 6 ohm ballast resistor from a 1974 Jaguar XJ12.

Or a 6 Ohm, 25 Watt ceramic case wire wound resistor from RS.

You could, if you wanted to release the magic smoke.

Even if the supply was clean enough (which it won't be, because it's a car), you can't regulate a non-linear load with a voltage divider.
To ride the Windcheetah, first, you must embrace the cantilever...

Torslanda

  • Professional Gobshite
  • Just a tart for retro kit . . .
    • John's Bikes
Re: Car satnav - replacing charging cable
« Reply #5 on: September 15, 2015, 01:18:29 pm »
Genuine Garmin supply cable has an aerial socket to receive traffic updates from Traffic Master. John Q. Random's cable probably won't.

Both my Garmin units connect with 'mini-usb' IIRC. Beyond the traffic info we have successfully used a USB lighter plug with an appropriate cable. Have you considered hard wiring the unit and screwing the bracket to the dash top? Like as not your next vehicle will have a built in nav unit . . .
VELOMANCER

Well that's the more blunt way of putting it but as usual he's dead right.

Re: Car satnav - replacing charging cable
« Reply #6 on: September 16, 2015, 07:13:51 am »
The No. 1 Thing Gone Wrong ( TGW ) from 3 month surveys of new vehicle owners is ‘SatNav troubles’.
Stay away from built in SatNavs.

No. 2 is ‘Cup holder not large enough’.
No. 3 is ‘Rear seat TV reception’.

Re: Car satnav - replacing charging cable
« Reply #7 on: September 16, 2015, 08:53:44 am »
Genuine Garmin supply cable has an aerial socket to receive traffic updates from Traffic Master. John Q. Random's cable probably won't.
Didn't realise that. We may have to soldier on then.

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<snip>
Like as not your next vehicle will have a built in nav unit . . .
It already has. The newer car came with a Tom-tom unit fitted. But replacing a car to get a new satnav would seem a little extravagant!  ;)

I may take up Feanor's offer so we have a spare.

S
"No matter how slow you go, you're still lapping everybody on the couch."

Re: Car satnav - replacing charging cable
« Reply #8 on: September 16, 2015, 11:30:38 am »
The No. 1 Thing Gone Wrong ( TGW ) from 3 month surveys of new vehicle owners is ‘SatNav troubles’.
Stay away from built in SatNavs.

No. 2 is ‘Cup holder not large enough’.
No. 3 is ‘Rear seat TV reception’.

3MIS TGW :thumbsup:  You a Fordy?

Re: Car satnav - replacing charging cable
« Reply #9 on: September 16, 2015, 01:21:04 pm »
The No. 1 Thing Gone Wrong ( TGW ) from 3 month surveys of new vehicle owners is ‘SatNav troubles’.
Stay away from built in SatNavs.

No. 2 is ‘Cup holder not large enough’.
No. 3 is ‘Rear seat TV reception’.

3MIS TGW :thumbsup:  You a Fordy?

I'll start a new thread for folks to list bicycle 'Customer Concern Codes'.

G001 - Gears too high.
E001 - Insufficient power when climbing hill.