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[amba]

I have just removed the roof aerial on my 03..3.2 and replaced it with a active Hirschamn dab aerial.

My plan is to retian the original ncdc 2013 sat nav but need some advise on replacing sat nav aerial.Previous advise was to pick up the sat nav arial cable in the drivers side foot well and then connect a magnetic type within the roof headlining.

As the original aerial has a joiner at the back roof position and I have got reasonable access with the head lining now dropped would it be possible to just connect into that existing point.The plug on the aerial is a plastic case with 2 black wires and what seems to be a 2 pin plug but all the magnetic type I have seen have the small MMX brass push in.

Is an adaptor available or a sat nav aerial magnetic mounted with the correct type of plug available as I havent any idea how to describe it on a google search

[zirk]

From memory, when we met, I thought we had worked out a way to sort all this, but the alzheimer's has kixked in since then. 

To try and answer you question, the Roof aerial that you have removed (saloon) has a black plastic twin Coax connector to it, one for GSM, the other for GPS, but I cant at the moment remember what the coax connectors are?

Anything is do able if you can work out what connectors you need and buy an adapter or make up a fly lead for it.

Just remind me what you were planning to do with the now missing Phone aerial?

[amba]

Original aerial removed from roof is in effect now surplus to requirements as I have used the hole it fitted into in the roof to fit my Hirschman dab which has its own lead and 12volt feed running to it.

Sat nav aerial has 2 black wires coming from it about 4 inch long and ending in a plug which was in turn connected to the aerial wire in the roof.

To retain the use of the existing sat nav, although probably will only get used once in a blue moon,I need to source an extra aerial probably mag mounted on the underside of the roof but need to come up with a way of getting the cables to join.In my niavity I had hoped to get a conneter to join the MMX type on the magnetic type to the plug of the cars own aerial if that was possible 

[zirk]

Original aerial removed from roof is in effect now surplus to requirements as I have used the hole it fitted into in the roof to fit my Hirschman dab which has its own lead and 12volt feed running to it.

Sat nav aerial has 2 black wires coming from it about 4 inch long and ending in a plug which was in turn connected to the aerial wire in the roof.

To retain the use of the existing sat nav, although probably will only get used once in a blue moon,I need to source an extra aerial probably mag mounted on the underside of the roof but need to come up with a way of getting the cables to join.In my niavity I had hoped to get a conneter to join the MMX type on the magnetic type to the plug of the cars own aerial if that was possible

Yep, the black plastic connector, actually has 2 x Coax Connectors in there moulded as a whole connector, think thats why I suggested you use the foot well connector as there split into 2 down there. suppose you could source the the other end on the Aerial plug under the roof lining and adapt that with the right connector to suit your GPS mag mount idea, but the aerial wouldn't work under the Roof Lining, it would need to sit outside or be parked on the front dash or rear shelf so it can view through the glass upwards, another reason it would be easier to use the footwell connectors, if all that makes sense.   

[amba]

Ok...will leave the loose plug in the roof lining and put it all back together.

If its easier to pick up at the foot well thats where I will next look and see what connections are down there.

Hadnt realised all aerials require an " external sight of view" so maybe a glass mounted aerial would be the way to go ?just need to find a way of linking up the cables.

So the loose 2 wire plug in the roof is for both GSM and GPS...1 lead for each ?

[zirk]

Ok...will leave the loose plug in the roof lining and put it all back together.

If its easier to pick up at the foot well thats where I will next look and see what connections are down there.

Hadnt realised all aerials require an " external sight of view" so maybe a glass mounted aerial would be the way to go ?just need to find a way of linking up the cables.

So the loose 2 wire plug in the roof is for both GSM and GPS...1 lead for each ?

Yep, shame (I guessing not long enough) that lead cannot be pulled back and routed to the back parcel shelf and fit the old aerail there to get you out of trouble for the time being. 

[amba]

I will see if I can pull the old lead out of the roof from the drivers side rear wing panel that way there will be atleast some lead visible.

Might then be able to get a glass mounted aerial for the rear screen...just need to work out how to join them all up as I imagine all glass type aerials will only have a single lead connecter and I need to first work out which of the 2 black wires is for the sat nav,then get a plug to join up.

Dont supose I could cut the plug off the old removed VX aerial and some how join wires to a plug that would connected to glass mount.

[RobG]

Ok...will leave the loose plug in the roof lining and put it all back together.

If its easier to pick up at the foot well thats where I will next look and see what connections are down there.

Hadnt realised all aerials require an " external sight of view" so maybe a glass mounted aerial would be the way to go ?just need to find a way of linking up the cables.

So the loose 2 wire plug in the roof is for both GSM and GPS...1 lead for each ?

[amba]

Cheers for picture Rob.

Looks a whole lot easier picking up those connecters,just need to source a suitable fly lead to go from the sat nav connecter to plug type on a screen mount aerial as don,t fancy anything magnetic stuck on the outside of the car

[TheBoy]

I'd pick  up at any convenient point near the back, and put a mag receiver above the metal but under the composite part of parcel shelf. Works well, as no metal shielding it

[VXL V6]

I'd pick  up at any convenient point near the back, and put a mag receiver above the metal but under the composite part of parcel shelf. Works well, as no metal shielding it

That's where I put the Tom Tom external aerial for my ancient Go model. 

Works well when I have to use the hateful thing which isn't often thanks to having the NCDC working now 

[amba]

Good idea about the location of the mag mount as can get it under parcel shelf as most of the back is stripped out.

Had a closer look at the original VX aerial and quite simple to pull apart once the silicone is removed from the 3 screws and back cover removed.

Now have 2 black aerial cables and the shaped metal base plate...1 is soldered into a white dish washer size tablet with 7-253 stamped onto it and has a metal plate which seems to earth onto the base plate..other wire is soldered into a circuit board which then has a peg which when refitted connects to the base of the stubby rubber aerial.

Question is which one is for the GPS and which is for the GSM as if they can be identified it would seem a simple soldering job to get a plug which can hook up to a female MCX plug.

Getting there

[TheBoy]

Use a meter from passenger kick panel to positively identify. Been a while, but vaguely recall at aeerial, they all look the same

[amba]

Yes both leads look identical at the aerial joint..just wondered wht the white tablet thing was .maybe its an amp for the gps.

Will get meter out and see which is which

[zirk]

If its pluged into the HU then the GPS one will have +volts on the centre core pin, where as the GSM one wont. If the cable reaches to the back parcel shelf then just unscrew the GSM whip from the old aerial base and stick that under the rear parcel shelf, the right way up.