Tesla Y Owner's Manual page 81

Trailer Brakes
When towing a loaded trailer that weighs more than
1650 lbs (750 kg), Tesla recommends that the trailer be
equipped with its own brake system adequate for the
weight of the trailer. Ensure compliance with local
regulations. A brake controller must be purchased
separately, and the required 4-pin pigtail connector can
be ordered from Tesla Service.
Follow these steps to connect a brake controller:
1. Connect the wiring on the brake controller to the
appropriate locations on the 4-pin pigtail connector.
2. Remove the cover located under the dashboard in
the driver's side footwell.
3. Peel back the carpet to expose the vehicle's 4-pin
connector on the wiring harness.
Driving
Towing and Accessories
4. Connect the pigtail connector to the vehicle wiring
connector.
WARNING: Towing increases your stopping
distance, even when the trailer is equipped with its
own braking system. When towing, increase your
following distance and avoid situations that could
potentially cause heavy braking. Failure to do so
can cause a collision.
WARNING: Observe all regulations and legal
requirements in your regional and national
jurisdictions that apply specifically to trailer towing
and brake requirements. Many regions require a
breakaway switch, located on the tongue of the
trailer, to activate the trailer brakes in the event
that the trailer separates from the vehicle. Failure
to comply with regulations can compromise your
safety.
WARNING: Follow the instructions provided by the
trailer brake manufacturer to ensure that trailer
brakes are properly installed, adjusted, and
maintained. Tesla is not responsible for damages
caused by incorrect installation of trailer braking
systems.
Parking with a Trailer
Whenever possible, avoid parking on a grade. However,
if parking on a grade is absolutely necessary, place
wheel chocks under the trailer wheels. Consider having
someone help you with these steps:
1. One person presses and holds the brake pedal.
2. A second person places the wheel chocks under the
wheels on the downgrade side of the vehicle's tires.
3. When the chocks are in place, release the brake pedal
and ensure the chocks hold the weight of the vehicle
and trailer.
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