The Mustang shenanigans of a Bavarian

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Alright so I sent out my Tail lights to get modified since in Germany indicators need to blink in amber and a additional rear facing high brightness fog light is required by law.

Since I don't want to ruin the appearance of my car with anything added seperatly I looked around and found a company in Poland that modify the tails for german regulations while keeping the stock apperance.


Reached out to them and they said they'll only modify the harness part. So I got a extra set of harnesses while in the US to buy my car, put them in the tails once I had the car here and sent them out.

Now got the tail lights back..... I expected differently.... On the outside it looks fine apart from some loose wire sticking out but underneath the tape the quality really isn't good. And wiring it up is a mess..... I couldn't understand the diagrams and had to test through it all to understand. And a bunch of just cut wires hiding.... I'm gonna be redoing all of the wiring because I can't leave it like this.
One of the sockets was swapped out and siliconed in.... so if anyone has a spare tail light harness (just one side) they can sacrifice and send me I'd really appreciate it. Gonna use the bulb sockets and wire it all up so it looks factory and is fully removeable if it ever needed to be. Luckily this is the extra pair I bought so they don't mess up the original.

If anybody knows where to get connector terminals/pins to crimp please let me know.

I'll try to get a video uploaded.

With the tape still on:
IMG_20250618_122231175.jpg
IMG_20250618_122219689_HDR.jpgIMG_20250618_122235613.jpgIMG_20250618_122247136.jpgIMG_20250618_122306610.jpg







Without the tape:
IMG_20250618_122344696.jpgIMG_20250618_122415411.jpgIMG_20250618_122358428.jpgIMG_20250618_122421585.jpgIMG_20250618_122429147.jpg
 
Last edited:

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
The Resistors and Module were siliconed in to waterproof them.
I'll test the lights how they are on the car, write my own diagram for it and redo it all. Already figured out how to depin the connector.

For the resistors and module and other sensitive connections I'll make a box that will be mounted behind the carpet so that behind the grommet/chassis seal on the outside will only be wires.

Just need another single tail light harness so that I have two sockets for the inner most light and I need a place were I can buy terminals for the connector to crimp myself. Any help is appreciated!
 
Last edited:

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Thought the first, apparently the latter....
1750773576984.png

Same Reason I didn't buy a already imported Mustang..... because of stuff like this.....

Anyways I found out which terminals I need and found them in a set to crimp myself. Just need a harness for the extra sockets....... and the people here either don't have the harness, just the housing or don't wanna sell the harness alone..... not gonna pay 150€ for a single tail light tho.....


*Sigh* as always this is gonna take longer than I expected......
 

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Okay so I tested out the Tail Lights today. Complete mess.... brake lights and turn signals seemed to be problematic which we later figured out is because they feed from the same pin and just the SJB gives out the intervall for it.
After going through the diagram they sent me I realised they wanted me to basically just wire from the front turns to the rear, from the brake light switch to the rear stops, cut a bunch of original connections and just in general do exactly the opposite of what I wanted to do. Never was it mentioned that anything else other than the rear harness needed to be modified..... like why the hell should I sent them in to modify them if I still have to hack up the rest of the car......

Like look at this mess:
Unbenannt.jpg

Great.... what a waste of a harness....
I'll have to see how I can resolve all of this with the people that did..... that..... to the harness and see about just building my own.....
 

GriffX

Senior Member
Joined
Sep 28, 2017
Posts
1,512
Reaction score
1,035
Location
Rural Germany
I don't get it. Should it work like in the video? Where is the running light module? Switch back LED lamps? Otherwise how to get amber through the red glass? Where ist the fog lamp, what bulb?
I have only one additional reversing light and it is very dark, enough for regulations but not good.
 

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Yes it should work like the video. Switchback LEDs are in the Stock sockets and the sequential module is in the tail light harness. One of the reverse lights is replaced with a red LED to get the rear fog.
The Problem is there is no module to split the brake and turn signal which comes from the same wire and because of that they want me to get all of that from somewhere else in the car WHICH WAS NEVER MENTONED and I would have never sent anything to them if I knew that.

After asking if only the tail light harness or the housing aswell is modified they said quote: "In general, you need to send the whole lamps so that we make you everything ready, but the change itself is made only on the wiring. So if you want a spare original, then just buy the wiring." No mention of the SJB or brake switch or front turn signals and nothing on the website......

As always a to good to be true situation.....
 

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Alright time for a month late Update.

Things got worse. They didn't just cut up only the harness (which I got extra spares for) like they told me..... No because one bulb socket doesn't have two connections the put in a new socket..... and how did they do that? Find some splice in ones that fit the housings which you can literally find on eBay? Try and build their own sockets to fit?

NO JUST FUCKING MELT SOME RANDOM NOT FITTING SOCKET TOGETHER WITH THE HOUSING AND THEN COVER IT IN BLACK SILICONE SO YOU ONLY SEE IT WHEN YOU TRY TO GET THE HARNESS OUT TO SEND BACK THE LEDS FOR A REFUND AND REDO THE HARNESS:

IMG_20250627_132729162.jpgIMG_20250627_125714453.jpgIMG_20250627_125711569_HDR.jpgIMG-20250627-WA0006.jpeg

Great.... Tail lights are trash now because it destroys the seal when trying to get THE RIGHT SOCKET in..... the ONE thing I don't do myself....

I could see from the outside they used a different socket but thought the silicone was just to hold it in place, NOT THAT IT WAS MELTED TOGETHER.
Which annoys me most because the production date on them fit the car and I specifically told them I want everything to be reverseable and if they had told me WHEN I ASKED THEM we'll modify the housing aswell not just the harness I would have bought a spare of those aswell.... Can't even do what they're telling me.....


Now after weeks of arguing back and forth with them they agreed to refund me and pay for new ones AFTER I sent them mine back.... Found a NOS set on eBay US for around 130€s with new harnesses, just not in the original box anymore (bought in bulk from a dealership). My guy that forwards me everything out of the US confirmed they were brand new. So I'm just waiting for those now until I send the others back.


But OF COURSE CUSTOMS HERE who already delayed the whole box arriving BY A WEEK now wants me to wait for a letter AND THEN pick it up in person because of some bullshit again....


I can deal with alot of bullshit but waiting for things just always drives me crazy, because I can just do nothing about it.
And Postal Services just don't give a fuck because they know you rely on them..... which is another thing that drives me crazy - relying on unreliable people.....


In the mean time I figured out and bought pigtails, terminals, switchback amber and red LEDs, a blinker splitter, amber bulbs, red LEDs, a sequential module and basically almost everything to make this whole thing myself in a plug and play completly reverseable solution. Only thing I'll need to do is run switched power front the front to the back. So I'll have to see if there's like a switched fuse location that would for example be used for the convertible stuff (which mine isn't) or something else I don't have which I can just repin/reuse for my wiring.


Front Turn Signal Housings will need to be switched for clear ones because my parking lights can't be amber. Ordered those in the begining of the month aswell and guess what.... they were out of stock. So I got a tracking number two weeks later when they supposedly had stock again which hasn't updated since..... great.... have I mentioned already that I hate waiting?

Got 3156 amber bulbs which I'll bend the pins to the correct contact (if I have to) for the turn signals and will just tell inspection the corner lights are the parking lights. Easy way out.


90% of everything has just been a waiting game and it'll continue.... I wonder if I get the car on the road by the end of august..... probably not but we'll see.....
 

GriffX

Senior Member
Joined
Sep 28, 2017
Posts
1,512
Reaction score
1,035
Location
Rural Germany
Well.... you could have used an out-of-the-box solution for the lights, but.... ;)
Wait until the TUV says nope ;) Still surprised that they approved my home depot undertray style.
 

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
What out-of-the-box solution are you talking about?
Actually I've talked to TÜV about the tail lights and the only thing that could be problematic is the solution for the rear fog light, but I'll just have to find a TÜV guy that's cool with it because I'll probably never use it anyways.

Front corner lights as parking lights could also be kinda "eh" depending on the who looks over it.

But honestly I've been watching different cars while driving around for work and looked at multiple US Imports when I found them and how they do lighting and.... it's literally dependend on how cool they guy is that looks at it....

How far can one stretch the "Etwa-Wirkung".....
 
Last edited:

GriffX

Senior Member
Joined
Sep 28, 2017
Posts
1,512
Reaction score
1,035
Location
Rural Germany
The solution with the blinker in the backup lamp and the 5W5 in the front lights is well documented. And from 07 on it is easier to realize because of the new SAM which can deliver more current.
 

DE_Marcus

Member
Joined
Mar 25, 2025
Posts
119
Reaction score
52
Location
South Bavaria, Germany
Alright, so where do you put your reverse light? Where the rear fog light? How do you fit the W5W in the Front lights? And how do you wire up the rear blinkers?
 

GriffX

Senior Member
Joined
Sep 28, 2017
Posts
1,512
Reaction score
1,035
Location
Rural Germany
There are 3 options, an amber/white LED, install a 2nd socket in the reverse lamp or an additional light below the bumper. In the front a W5W socket in front of the reflector. 3rd brake light split to the brake lights in the middle of the tail lamps, fog light inner left, normal light all three. the outer red brake lights are wasted in resistors.
Front blinker ist the first chamber, the 2nd sidemarker only.
 

Support us!

Support Us - Become A Supporting Member Today!

Click Here For Details

Back
Top