 | Home > In Car Electronics > Hard Wiring a Garmin GPS |
 
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All that was said is that the source should be a 2A power source and not a 1A power source otherwise it would go into the PC mode thing where it thinks it's plugged into a computer.
| ARC99 Member Since: 19 Feb 2013 Location: North Yorkshire Posts: 1831   
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I must admit that I had to go and cheat (consult to interweb) to confirm my thoughts as it has been a couple of years since I had a usb plug to bits.
USB's have 4 wires, two for power and two for data, the ones you need are the red and black , red is + and black is -. Don't make old people mad. We don't like being old in the first place, so it doesn't take much to  us off.
Richard |
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13th Oct 2020 8:05am |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039  
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I bought an additional cable and run that cable below the dash on my Camel Discovery where I made an ignition controlled lighter socket. Roel
1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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13th Oct 2020 8:09am |
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| Balvaig Member Since: 19 Feb 2016 Location: Fife Posts: 730  
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Garmin are not good on information.
Mine has the built in FM traffic updates, and you can only use the Garmin lead if you want to maintain this feature. This means hard wiring another lighter socket and using the Garmin lead, perhaps hidden behind the dash. If you don’t have the traffic feature, then I think it will work pugged in to a USB socket or a 5 v supply, as long as it supplies the 2 amp. I think the USB wiring detects whether you are connected to a computer . I must admit I gave up at this point and just plugged mine into the lighter socket.  |
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13th Oct 2020 8:13am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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As Balvaig mentions, USB devices run on 5v, so you can't just wire them directly into the vehicle wiring. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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13th Oct 2020 8:17am |
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| ARC99 Member Since: 19 Feb 2013 Location: North Yorkshire Posts: 1831
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Traffic updates are received through the device not through the USB cable . Don't make old people mad. We don't like being old in the first place, so it doesn't take much to us off.
Richard |
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13th Oct 2020 8:22am |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2227 
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You can buy USB sockets designed to go behind the dash out of sight for permanent charging installation.
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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13th Oct 2020 8:54am |
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| ARC99 Member Since: 19 Feb 2013 Location: North Yorkshire Posts: 1831
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search for usb hardwire car kit plenty on the interweb.
I bought some to allow me to charge phones etc. while away in the caravan and only running off a 12 volt system recharged by solar panels . Don't make old people mad. We don't like being old in the first place, so it doesn't take much to us off.
Richard |
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13th Oct 2020 9:36am |
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| 24heuer Member Since: 21 Jul 2015 Location: Edinburgh Posts: 167 
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I ran my lead down the back of the dash to the fusebox.
As the cigar lighter style connector plug converts from 12V to 5V I kept it on and I’m using a 12V cigar lighter socket with a flylead hooked up to a fuse tap. I think I got mine from Halfords or some other accessory shop. They're also on eBay - https://www.ebay.co.uk/itm/Cigarette-Light...2181457778 All of this is neatly hidden away behind the fuse panel. Cheers, Andy... Edinburgh, Scotland http://24heuer.com |
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13th Oct 2020 12:15pm |
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| lakelander Member Since: 07 Jan 2017 Location: Cumbria Posts: 100 
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i bought an additional one plug accessory socket and mounted it behind the facia out of sight but not too far from the existing oe 12v " cigar lighter socket. i powered it by piggy backing onto the cigar lighter. i then ran a Garmin accessory cable up in the creases of the facia to the windscreen. You can make it almost invisible in the cracks. Alternatively you could run it behind the fascia and drill a small hole for it to exit at the top. btw make sure you use a genuine Garmin accessory cable as some of the ebay ones don't work  |
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13th Oct 2020 12:27pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2227
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It really is better to put a fused supply from the battery rather than piggy back off something else, guys!
It's not rocket science. Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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13th Oct 2020 4:27pm |
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| lakelander Member Since: 07 Jan 2017 Location: Cumbria Posts: 100
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Ok- my set up has been working fine for 3 years now. i rarely use the oe lighter socket and i use the Garmn all the time
am i in danger of causing any damage with the way i have done it  |
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13th Oct 2020 5:28pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1073  
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In theory not. The lighter socket is fused @ 20A. If your Garmin draws 2A @ 5V that's about only 0.8A @ 12.5V, so no problem there. If you have a tow bar: its permanent live is on the same fuse, so you'll have to add whatever current your trailer/caravan would draw. However, the wire gauges are too small for my liking and I wouldn't use a fuse's value as guideline for max amperage. In practise I'd say it depends on how you made the piggy back connection. I'wouldn't recommend those wire-cutting thingies. Well-crimped and insulated connectors are the better choice. But best is what Mo suggested. |
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13th Oct 2020 8:21pm |
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| lakelander Member Since: 07 Jan 2017 Location: Cumbria Posts: 100
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Thanks for putting my mind at rest. I soldered the connection onto the back of the cigar lighter socket.
as you can see i am a real amateur - dont understand how i would connect it directly to the battery ? it's under the passenger seat.  |
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13th Oct 2020 8:36pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1073
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Indeed. Unfortunately there is a concept of connecting resistors between the wires of USB. This is usually used to tell a device about how much amperage a power source is able to provide. Different manufacturers may use different resistors to encode all kinds of features, making chargers and cables incompatible  It's a mess really. I have an old Nokia phone for example which would not charge with 3rd-party USB cables, unless I put a USB voltage meter in between...
One of the above-mentioned "hardwire kits" (advertised for dash cams) I bought wouldn't charge my iPhone. Some googling and soldering later it does now  |
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13th Oct 2020 8:40pm |
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