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Welcome to round 2 of what do to with a PCM head unit! Last time we installed the PCM head unit, this time we are going to install the Navigation components needed to add and display Navigation on the PCM screen. I want to caution up front that I recommend buying the Navigation parts as a package, for example from Suncoast who sold me the PCM unit. I took the hard way of doing this, piecing together Navigation parts from various sources. The problem with doing that is that Porsche constantly releases updates to these parts and there is no guarantee that parts sourced separately will end up working with each other.

The other recommendation I have is to download the following installation instructions:
http://www.caymanclub.net/downloads....file&id=46
I printed those out and followed them as closely as I could to do the install, without them I would have been lost. Note that there are 2 install guides in our Files section, both are different, but I think this one is the newest and was certainly the correct one to use on my 2006 Cayman S.

Let's get started with some pics, first off the front trunk open, box of parts inside and printed directions:
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The first step is to remove the side plastic strips under the hood. These are just velcro'd down and clipped in at the front of the trunk. They are very easy to remove.
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Next you will need to remove a series of phillips screws that hold the main plastic housing down. Note that you will also have to disconnect the wire for the trunk light to remove the plastic piece:
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Here is the piece sliding out:
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Here the piece has been taken out and you can see the area in which we will be installing the Navigation drive unit.
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Next remove the battery cover and the two plastic pieces to either side of the battery cover. They simply have locking clips and are easy to remove as shown in the next photo:
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Next we need to remove the plastic piece that is at the bottom of the windshield. To do so start at eitehr end and remove the plastic covers that hide nuts. Use a ratchet to remove the nuts, one at each end.
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Next we need to remove the windshield wipers. To do so we need to first pop the end-caps off the wiper arms that hide the nuts underneath. Use a slim screwdriver in the slot provided to pop them off.
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You can now remove the wiper arms by removing the nuts with a ratchet and then flexing the arm to remove tension on the pin and lift the arm up. DO note the position of the arm before you remove it.
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There is also a torx screw in the middle, remove this too:
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Finally, hidden behind the battery are two electrical connections for the washers (grey) and two black press plastic rivets. You'll probably need a needle nose pliers to get the press rivets out but the electrical connections just have a tab to hold back and they pop off
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Here is a shot of all the plastic pieces removed. Whew lots of work before even getting into the meat of the install. The regular box in the upper left is the cabin air filter, mine was kind of dirty but I didn't have another one to swap at the moment.
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Now take the windshield plastic piece you just took off and turn it over. Underneath, near where the cabin air filter is, there will be a spot to mount the GPS antenna. Before you can mount it, however, you have to install this retaining clip. The part number is shown in the photo and is in the install directions in that Porsche PDF file that said to download and follow.
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The antenna then clips in on one end and use the screw in the install kit to fasten the other end to the clip.
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Next you will want to test fit the correct end of the GPS antenna wire that runs to the Nav unit. Note the end shown in this picture.
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Now to route the GPS antenna wire to the Nav drive unit we have to feed the antenna wire through the wall that separates the trunk area from the battery area. To do this you need to move (not necessarily remove, I didn't) the charcoal cannister to expose a rubber grommet that you will punch through.
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Here is the rubber grommet hidden behind the charcoal cannister exposed. I used a punch to poke a hole in the rubber grommet large enough to feed the antenna wire through.
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I coiled up the extra antenna wire (a lot) next to the battery. The left side of the next photo is where you will hook into the GPS antenna and the right side is where you will feed the wire through the grommet into the trunk to connect to the Nav drive.
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Here is a nice shot of the wire coming through the grommet and being routed over to where the drive will be installed.
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The next operation is to splice the wires needed to power the Nav drive into the wires that go to this connector for the CD drive. You can splice upstream and leave the CD connector if you are ever going to install a CD drive, or simply cut and splice if not. I chose the cut and splice method.
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Splicing in the wires:
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Apply heat shrink tubing to seal:
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Now we can turn out attention to installing the Navigation DVD drive unit. First we have to install the holding bracket, note that the carpet piece has been pulled back and will later be trimmed off:
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The retaining bracket/housing for the drive is held in place by 4 clips, here is a close up of a clip, note the orientation, they only go in one way.
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In this photo I have fed the power wires on the left and antenna wire on the right through the back of the housing and attached to the DVD drive unit.
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Now comes the installation of the MOST fiber optic cable. Pay careful attention to the instructions which have the correct part numbers for various combos (Bose, No Bose, CD, No CD, etc.) The first cable I was sent had 3 fittings on it and was for if you had a CD drive too, I had to exchange it for this one with 2 fittings, one for the bus lead end and the other for the Nav drive, otherwise you would get MOST bus error and it will not work.
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One end of the cable installs behind the brake vacuum tank, you can see a bit of orange MOST fiber optic cable to the right, then feeds around behind and bring it through the housing. There are tie down straps you can fasten it down tight with later.
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Next attached the other end of the MOST fiber optic cable to the DVD drive as shown in this photo, then insert the drive into the housing until it clicks/locks into place.
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Now I turned on my key and turned on the Nav system and received this statement, a good thing, it means it all is working!
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To my surprise it thought I was located in the UK until I drove the car a few blocks and it re-synched with the satellites.
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Reinstall all the plastic pieces and you are done!
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Total time for the install was a couple of hours because I had to figure some things out along the way. Following the Porsche instructions and this article you should be able to knock it out much faster. If you have any questions please ask them in the forum as a response to the news item topic.

So far everything seems to work great with the Nav system, routing, zooming, guidance, etc.