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What you are trying to do will work because I've done it and it worked on my 2018 Model 3. But the taillight word are very thin and hard to work with without damaging them. The Y connector is the best solution, or otherwise I would recommend getting the Tekonsha Zero Contact Universal one that I've also used on Model 3 TEKONSHA | 119250 | ZCI™ Zero Contact Interface Universal ModuLite®It's also worth menitoning the product link you provided is very scarce or non existent. I can't find a seller that sells it as of the date of this post.
You did not mention the car was a 2024!No because the wiring changes depending on which year model Y you have and it looks like that product doesnt fit a 2024. I am talking about wiring something like the following directly into the factory harness of the tail lights / turn signals. This can be bought for less than $10 bucks vs $100s with the link you provided: View attachment 1059545
Have u personally tapped into the tail lights directly? Looking for someone who has. I won't be using the ZCIYou did not mention the car was a 2024!
Hey I am a penny pincher also but this is one area I try to not skimp too much, too many things could go wrong, I would not connect directly to the wires in the car without a interface that isolates the trailer lighting from the car electrical system.
Then try the ZCI from Techonsha, YES they are expensive but it is much cheaper that taking the risk of melting the OEM wiring harness of your car.
Or having the car complain about over voltage or what ever it will be detecting as a fault in the wiring harness.
Last time I tapped into the rear lights directly was way before the lighting in cars was computer controlled/monitored, as I said I personally would NOT tape in directly into the wiring harness.Have u personally tapped into the tail lights directly? Looking for someone who has. I won't be using the ZCI
I tapped into the wiring for the taillights directly on my 2018 Model 3 and it worked fine, like I mentioned in my previous post. But I don't know if the newer wiring and computers in the Model Y will still work fine that way.Have u personally tapped into the tail lights directly? Looking for someone who has. I won't be using the ZCI