Motorhome GPS antenna

The wire I found behind the radio / sat nav just dissapeared into the wiring loom. I was going to use it for my new head unit but just fitted the one that came with it in the end. It could be anywhere.

I believe the gps and radio aerial are in the L/H wing mirror 

If it's a new MH then the Sat Nav / Radio fitting is a nightmare. The kit from Connect2 is a bit basic and you do have to use your imagination. I fitted the GPS unit at the front right down by the window and ran the cable back and under the slooping front
lid. If you remove the IPad holder with its four screws you will see the surround can be lifted by undoing a couple more screws and giving it a good pull. If you are fitting a Double Din Sat NAv then you will need a Dremil or similar to make the hole in the
dash big enough for a double din cage. It seem easier to fit the cage with the brackets pop riveted to the side.Once the cage is in place and everything lined up it's fairly easy. You certainly won't manage it in a couple of hours if you want to make it look
smart. If it's a Chinese unit then you may find that it's Windows CE with front end software to run a few Android Apps. I fitted a Blaupunkt 945 Capetown with Android ICS 4.1

The earlier one is easy to fit. Just chop out the bit across the middle. The Connect2 kit fits using the screws you take out. Top ones are a bit of a fiddle but al relitively straight forward. If you find a wire for the GPS Antena then you could just try plugging it in. The Blaupunkt I fitted which was a cheaper option than a lot came with antena in the pack. It's good as it reports better than 2m acuracy. Another point to watch is you need a Can Bus adaptor especially if you need the 12v Aux input connection or a Speed Pulse. If you fit a reverse camera you also need the Reverse Input. None of these are available under the dash. You have to hack into the Can Bus. Only two wires. They are down round the fuse box on the right of steering wheel. They don't make it easy. I have just removed a UConnect5 Sat Nav from our new Fiat X290 Ducato. Now that unit is a load of rubbish. Stripped down Tom Tom Sat Nav. Manual Entry POI's. No way to import them. No way to import speed camera data apart from their way at their price.

You can pick the CanBus wires off the OBD2 Socket down where the fuses are. Remove the two screws holding the black flap in place. Then if you look a little higher up the panel you will see two more screws that hold the larger panel in place. One is easy to see the other is buried to the right side. Remove these and you can give the large panel that goes down and under the steering wheel a pull and you can then get to all the wiring without having to try through the small hole where the fuses are. You could just fit an an OBD2 plug and a couple of wires to pick up the CanBus. This is twisted pair wiring so the two wires must be twisted together to work over a longish run. Easy enough to achieve. This with the Connect2 or Canm8 will give you the speed pulse. Reversing signal. Handbrake signal, Acc Signals that you need for correct installation of Aftermarket head unit. The speed pulse is not available unless you use the CanBus. The Blaupunkt 945 Capetown does not use a speed pulse. Runs Android 4.1 Has IGO Primo. Mine cost me £595 new. Will work with reverse camera as well. Also has AV output so can drive other units. I have a separate 7" screen for the reversing camera and this has an AV input. So I have the Sat Nav showing on both screens. Works really well.