Don't use the driving light there is a better switched live to use I think it is number 15 but your best to search for it - I found this out when I bought a upgraded light loom for my R8 lights!

 

I fitted an extra 12v socket in the dash tray for the sat nav and chargers, there's just enough room on the right hand side section to drill and fit it. This gets rid of annoying wires across the front of the radio.

Mine is wired straight from the ash tray socket so permanently on but I have a relay (which I haven't got round to fitting yet) which will interrupt the supply and be switched by the "key out" wire in the loom behind the glovebox.

 

Thanks. I haven't gone the relay route. I have been told to look for a "Terminal 15" circuit, which is fuse 1 on fusebox B (fuse box under radio, top section), but this circuit is always on (1-Fuse -30 A-Terminal 15 voltage supply relay -J329-30) .
I also tried the following fuse that looked harmless: 25-Fuse -7,5 A-Fresh air blower switch -E9-30, but this is an always-on circuit as well.

Reason why the driving light circuit I used doesn't work is that it detects a deviation from the prescribed perimiters when the GPS draws power and automatically shuts down the circuit - bummer!

So I am still looking for a harmless circuit that is ignition activated that does not mind an extra load...

 

Hi Everyone

I have recently bought a lwb Transporter 11 plate, I have used my sat nav in the 12v outlet no problem, but when I tried to charge my phone the fuse blew-or at least I think it has. I checked the handbook but there is no fuse list so rang vw Leicester who told me to check the fuse under the passenger seat, trouble is I don't think the seat moves, it's just mounted on a steel box! I have painstakingly removed and put a continuity test on all the fuses under the bonnet and the fuse panel under the pull out cup holder/12v outlet. I am lost without my sat nav, any suggestions?

Many thanks

 

Hi Tuner, there is a fuse under the passenger seat, and it should lift up, pull up sharply under the front of the seat pad, you will feel it click upwards, and then the seat will tip forward.

 

Would a GPS or mobile phone discharge the battery so much that car wouldn't start?

 

I'm not sure that this is going to help the OP much, three+ years after they started the thread but, to answer your question: yes, it would, if you left it on long enough. But for most GPS receivers/phones you would have to leave it on a ~long~ time!

However, some other devices (e.g. tablets) can have quite high power consumption, and they would not take quite so long...

 

Depends on how weak and old the battery is.

If youre tapping existing fuses, its much easier and more stable to use a pigyback fuse holder

 

Bugger, I was hoping to find an answer at the end of this thread but it seems that there is still no solution to a fuse that ignition dependent.

I don't want my GPS on all the time plus I want to wire up some other goodies that need to turn off when ignition is off.

 

Then use a switched live tap from an existing wire in the dashboard.

Or try this : http://www.vwt4forum.co.uk/showthread.php?t=944137

If you remove the stereo and centre tray and facia etc you can access the wiring to the fan speed control, one of which is a switched live. There is also permanent live wiring in the main loom you can access by removing the glove box.

I would suggest you dont place much extra power demand on switched live wiring, instead use a feed via a relay thats also tapped into a permanent live feed in the extra kit so the permanent live is switched with ignition, also put inline fuses on the switched and permanent live taps (properly rated), and use wiring with adequate csa for the total current demand youre powering, while also taking into account the csa of the original wiring youre taking the feeds from.

If that all sounds bit difficult the I suggest you consult a professional instead.