Hi
I'm not understanding how you isolate the left and right turn signals or the brake light . I have a wiring kit with snap on connectors . What do I do with the volt meter to locate the matching snap on attachments
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I'm not understanding how you isolate the left and right turn signals or the brake light . I have a wiring kit with snap on connectors . What do I do with the volt meter to locate the matching snap on attachments
RichardC
Cdn Sig & Solar Supporter
Paul, you may want to review the posts on the previous pages, which provide further background and details. The source of the problem is the fact that the Model S illuminates the tail light as a turn signal, as well as the brighter brake / turn signal light, which means that the tail lights on both sides blink when the turn signal is used when the running lights are off.
As detailed above, I used a low power 12 vdc relay to create a logical AND circuit with the tail light from one side switching the relay while the tail light circuit from the other side provides the power which is routed through to the tail light input on your isolator. In this way the tail light is not illuminated when only one of the Tesla tail lights is lit (i.e., when it is being used as a turn signal), but is lit when both of the tail lights are powered (i.e., when they are being used as tail lights, and not as turn signals).
You will need to run a wire from the second tail light on the other side of the to run to the relay (I mounted the isolator and relay on the passenger side and powered them from the panoramic sunroof circuit, through a separate fuse, and ran a wire with the tail light signal from the driver side through the rear frame to the relay).
It has been working perfectly now for a a number of years now.
I hope that helps.
Richard
airborne spoon
Active Member
4 pages of posts and nobody says where they put the trailer plug. I just tapped into the signal lines with a normal splice straight to the trailer plug and it works without issues. No need for expensive contactless things.
Currently i just put the plug outside the car and close the trunk on it but obviously i should stop doing this. I was thinking of running it outside the car through the rear wall and down the inside of the bumper and out the hole for the hitch. But then the issue becomes WTF do i do with it mine its not hooked to the trailer? I could just shove it inside there but it would roll around and just be an all around bad idea, any thoughts on securing it somehow if i went that route? or any other places to mount the plug. Also I'm using a 7 pin connector so its not that small 4 pin one you're used to seeing.
Currently i just put the plug outside the car and close the trunk on it but obviously i should stop doing this. I was thinking of running it outside the car through the rear wall and down the inside of the bumper and out the hole for the hitch. But then the issue becomes WTF do i do with it mine its not hooked to the trailer? I could just shove it inside there but it would roll around and just be an all around bad idea, any thoughts on securing it somehow if i went that route? or any other places to mount the plug. Also I'm using a 7 pin connector so its not that small 4 pin one you're used to seeing.
This does not work on a 2021+ MS. As for where to put it, the Tesla hitch has a plug mount on it.
airborne spoon
Active Member
that would be a convent mount if it was an option, Now yes i could bolt it to the hitch frame and cut another hole in my bumper but I'm trying to avoid that.
For those like me with a 2021 onwards Model S for which the Tekonsha kit fails to work, I’ve just bought this: Swift Taillights ST01 - Portable Wireless Remote Controlled Temporary Tail Lights For Trailers
It doesn’t connect directly to the car and the turn and brake signals have to be operated manually using the remote, however it’s a potential solution for those of us who want to tow from time to time.
It doesn’t connect directly to the car and the turn and brake signals have to be operated manually using the remote, however it’s a potential solution for those of us who want to tow from time to time.
FMinMI
Member
It has been years since I did it but it is on the passenger side in a cable bundle and is a larger wire compared to the rest. Sorry, but I don't remember the color but it should be obvious. Just remove the carpet/cover on that side, follow the wire down from the power strut and tap in where you find it convenient. Good luck.
I should have posted this earlier but got busy.
I installed a "CURT 56236 Custom Vehicle-to-Trailer Connector" from Amazon.
As Frank suggested, I tapped into a "big" wire (constant 12V) at the liftgate control box. I wish I had taken a pic before putting the trunk liner back in.
Anyway I had issues with the other connections because the Tesla wires are thin, and the blue splice clips didn't make good contact, but I used some red ones that worked. Tie the "Brake" wire to ground. I recommend soldering instead...
At least in Canadian cars, the lights (running or headlights) must be on.
I will be installing another (with Ecohitch) in a friends 2017 MS, and hope to remember to take pix...
I installed a "CURT 56236 Custom Vehicle-to-Trailer Connector" from Amazon.
As Frank suggested, I tapped into a "big" wire (constant 12V) at the liftgate control box. I wish I had taken a pic before putting the trunk liner back in.
Anyway I had issues with the other connections because the Tesla wires are thin, and the blue splice clips didn't make good contact, but I used some red ones that worked. Tie the "Brake" wire to ground. I recommend soldering instead...
At least in Canadian cars, the lights (running or headlights) must be on.
I will be installing another (with Ecohitch) in a friends 2017 MS, and hope to remember to take pix...
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