I'm trading out the stock radio for an aftermarket unit.

My idea is to add an extension to the stock Nav radio GPS antenna so that I can use the stock GPS antenna with an aftermarket GPS unit. So, I'll need a coupler to connect the stock GPS cable to an aftermarket GPS cable/unit.

But, I don't know the name/type of connector used on the stock and so I don't know what to look or ask for when I go to companies that supply connectors and adaptors.

I've attached photos if anyone can help.
The first two are with the black plastic piece that holds it to the back of the radio. I then removed the plastic piece for a better look on the next two photos. I also attached a photo of where it once connected to the radio.

 

I don't mean to shoot you down, but, well... Why?

The aftermarket unit will come with its own antenna, and they're generally pretty long leads to reach as far as you can imagine.

You might want to keep the one for the factory unit for, um, the factory unit.

You can check GPSCITY.COM for info about the connector but I'm not sure what they do with OEM in-car units.

It it was me, I'd use whatever comes with the aftermarket unit.

 

New Thread Started

Factory Amp

 

The enclosed antenna in any of the major player GPS units is more than satisfactory for any aftermarket unit I have seen or used.

I have used Magellan and Garmin GPS in a boat and in 4 cars of ours and they all work well due to the number of satellites present. Just keep the GPS unit on the dash where it has a "look" out of the windshield and you have no need to connect into the old Nav unit antenna. I have never had a "lost signal" interrupt in the boat or car and never have used an external antenna. It is not uncommon to have as many as 8 satellites displayed on your unit, sometimes more--and it only takes 3 for navigation data. Trust me, go no further with your search until you try the internal antenna.

Jim

 

I've installed a few factory GPS systems in my 300m and PT Cruiser DC and never had an issue with the antennas. Just use two-way tape and stick the antenna inside the console near the top, away from any metal. The antenna sees through the plastic of the dash no problem.

Put an RB1 in my PT six months ago, for instance, and did this. Just taped the antenna and shut everything up again. No muss, no exposed wires. Get perfect sat reception, usually seven of eight or whatever. Ran with the antenna exposed on top of the dash as well and had the same results. So you really don't need to bother with the external leads or whatever. Just leave the existing in place. Additional hassle you don't need.

 

And never had an issue with handheld Garmins or TomToms, either. The built-in antenna is all you need. I can get a good signal with my Garmin 350 sitting here at my desk, just propping the thing near a south-facing window.