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04 GT3 Cruise retrofit


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Having read this thread extensively...


I now have the required parts to add cruise to my (UK, RHD) 2004 GT3.

Beforr I start the job, could someone please (Loren?) post the wiring diagram/changes that are required for me to install the 4-stalk column (currently have 3-stalk).

Also, as the Porscxhe Centre have already failed to enable the cruise (the car was having other work done, they seemed to want to do it and didn't charge me)...some guidance as to the system changes/menus to help achieve the re-programming would be very helpful!



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Everything you need is in that thread, including the coding. Just treat it EXACTLY the same as a 2003/2004 Boxster and you won't go wrong.

Thanks Richard! I'll filter out all the relevant info and take it from there...

After initially wanting to get the job done before our trip to Switzerland, now that we're back there's plenty of other (non-GT3) priorities, so the job has been on hold...but I'm keen to get it done, so hopefully in the next couple of weeks :-)

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OK, I've filtered all the info and have a final few questions...

1. For the recoding, does it matter in which order you do the 2 recodes (OBC then Cluster, or vice versa, or does it not matter)

2. Secondly, there's a couple of mentions of "order type" when recoding...will I need to know this?

3. I plan to do the recoding at the OPC, as they are keen to see how this works! (...'cos they've not done a 996 of course), so can I get the recoding done BEFORE installing the cruise stalk and wiring? (I ask as I'll be going to the OPC next week and won't have fited the stalk by then)

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1. No, not as I recall.

2. Many of the cars that came out of Porsche's factories in MY2003 and 2004 did not have the order code entered in the DME. In order to change any coding the order type must be entered in the DME first. Once that has been done a re-scan is needed before changing any coding.

The correct order type for your MY04 GT3 RHD is 996811.

3. Yes it can be done before the wiring change. You will not be able to any change in the cluster readout until the wiring portion is done.

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As Loren says, once the order code is entered into the Vehicle Data of the DME it can be coded in either order in the DME and Cluster, before or after the stalk and cables have been wired up. Personally, I think it is better to enable it afterwards. The reason I say that is because you can use the Input Signals section of the tester to check that everything is wired correctly before you take it on the road. You can also check that the brake light switch and clutch switch are working correctly.

If you do get it coded first, you will see the cruise light come on in the cluster when you switch the ignition on, but it will go out when the engine is started.

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