Replacing the rear tail light

[PhillyTCT4S]

I am trying to replace my tail light with a new one that has led letters and was wondering if anyone has a procedure how to remove the plastic covers in the trunk. Trying not to damage stuff. Need some help where and how to start. Thanks.

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[Howieleem]

I am trying to replace my tail light with a new one that has led letters and was wondering if anyone has a procedure how to remove the plastic covers in the trunk. Trying not to damage stuff. Need some help where and how to start. Thanks.

If its the large plastic cover inside the rear door, I removed mine recently to see what i need to do to replace the rear light bar with the word Porsche in it.
It was just a case of pulling it away from the door with sharp pulls. The plastic is just held in with push in metal spring clips.
The problem i had was re-fitting it. I could not line up all the clips with their ascociated sockets.
In the end the Porsche garage fitted it whilst in for replacement battery module.

 

[PhillyTCT4S]

Thanks. I was able to remove both plastic covers, ton of clips....Hopefully will be able to put everything back without braking all the clips
On a positive note I have a new lightbar now and also disabled the crazy beeping speaker for the open/close trunk.

 

[Howieleem]

Thanks. I was able to remove both plastic covers, ton of clips....Hopefully will be able to put everything back without braking all the clips
On a positive note I have a new lightbar now and also disabled the crazy beeping speaker for the open/close trunk.

Great. Let me know how you re-fitted the plastic cover for future reference.

 

[trycan]

[...] and also disabled the crazy beeping speaker for the open/close trunk.

Can you share details on how you did this? Or did you just cut the wires to the beeping speaker?

 

[Dresz981]

Can you share details on how you did this? Or did you just cut the wires to the beeping speaker?

Interested also.

 

[PhillyTCT4S]

One of the members here posted a thread on how to do the speaker silence mode. Easy and a quick mod.

 

[Ezikiel37]

are you saying that it was a plug and play kind of deal to get the PORSCHE lit up on the J1s? I was under the assumption that hardware and coding had to be done.

 

[PhillyTCT4S]

For the lightbar it was just plug and play. No coding needed. If you also.want yellow side markers like in Europe coding will be required.
Got the lightbar from eBay, Latvia guy. Great dude, good communication. Everything works like it should.

 

[Taycan4S_UK]

For the lightbar it was just plug and play. No coding needed. If you also.want yellow side markers like in Europe coding will be required.
Got the lightbar from eBay, Latvia guy. Great dude, good communication. Everything works like it should.

Where is the before and after pics?

 

[Nickj]

For the lightbar it was just plug and play. No coding needed. If you also.want yellow side markers like in Europe coding will be required.
Got the lightbar from eBay, Latvia guy. Great dude, good communication. Everything works like it should.

So, are you saying you’ve fitted the red letter light bar to early non illuminated car and plug and play?

There’s a light bar on eBay from a Latvian guy and he says it’s plug and play but others threads all suggest not.

 

[PhillyTCT4S]

Yep, probably same guy from sparepartsoem. Just make sure to mention that its a US car.
First-time he send me a wrong light for wuro car...few days later corrected his mistake.
Yes, it was just plug and play.
Will post pics later

Also got yellow side turn signals fro him but these will require coding. Next project

 

[Nickj]

Ah, actually Lithuanian not Latvian. Different eBay name but location is the same, so problem same guy.

It’s UK spec as I’m in uk, but he says plug and play.

Yes, pics would be great.

https://www.ebay.co.uk/itm/406250894105

 

[PhillyTCT4S]

Quick pic from garage. Will get a better picture during the day.

 

[Danny W]

So, are you saying you’ve fitted the red letter light bar to early non illuminated car and plug and play?

I want my Gen 1 Taycan to have an illuminated logo as well, so I bought a spare tail light to see if it can be dissassembled and retrofitted. Unfortunately, the rear tail light is glued shut, so the next best thing is to fit a new generation tail light onto my car. I bought a ECE version, part no 9JA945082. So now I have the two tail lights side by side, and can compare. The 9JA part is mechanically compatible with the 9J1 part. The connector mounting is upside down, but that's not a problem.

I was worried because there is no info about the last pin in either connector - the 6 pin and the 8 pin, but fortunately this is not fitted on the 9JA part, so I'm confident that there is indeed no function on this pin. I also verified that all the normal pin connections between the 9J1 and 9JA part match, so no problem there.

I am an electronics engineer, so I wanted to know more about the LIN bus pin. the LIN bus has a pull-up resistor on the bus by design, so I can measure two things: 1) is the bus is indeed 12V, I know some brands have a 5V bus, and 2) what pins drive the LIN bus, and power the microcontroller inside. Both sides (the 6 pin and 8 pin connector) have pin 4 powering the LIN bus. Which makes sense, because the tail light indicator its connected to is lit pretty much all the time.

I bought a USB-LIN bus converter to experiment. The LIN bus is somewhat of a standard, so I can poll all of the 64 possible addresses and see what comes back from the tail light. These are the results:
Polling address 0x0B, i get 0xff 7f 00 00 fe ff ff ff back on the 8 pin connector. it also gives a response on address 0x38, with 8 times 0x00 bytes. The 6 pin connector does the same on address 0x0C and 0x3A respectively. Looks promising.

The entire time I sent data to the tail light, nothing changed, except for address 0x0A on the 8 pin connector. I tried sending bogus data, and I got the tail light to blink once a couple of times. That's it. Probably because I am sending invalid data, bus I'm pretty sure this is the address all the communication is taking place. For the logo being illuminated: I'm stuck.

During a regular service visit to the Porsche garage, I asked what it would take to have the logo light up. They didn't know for my car, but for the newer version they already did a conversion to an illuminated logo, and it just worked. Their reply: Just try it?

So, the additional motivation I got from this thread, it being plug and play, I decided to just change the tail light. During fitting, I saw that the LIN bus pin on both the 8 pin and 6 pin connector was not wired on the plug. You can predict the result: I now have a black non-illuminated Porsche logo. I guess it blends with the rest of my blacked-out logo's?

I don't even know if adding the LIN bus wires to the BCM2 will help, because then it expects ALL the rear lights to have LIN bus communication I assume, so it will throw error codes most likely. What I need is: A newer Gen 2 Taycan with working illuminated logo, to probe the LIN bus and see what the command sequence is to light up the logo. I have little hope.

If I know the commands, the solution will be simple: A small circuit between the 8 pin connector and the tail light to send the proper LIN bus commands to light up the logo. I already made an electronic design, but I don't know the commands... yet?

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