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Tesla Model 3 (2017–2026) Stealth Trailer Wiring Installation
Vehicle Coverage: 2017–2026 Tesla Model 3; exact trim and build-date fitment are verified before scheduling
Output: Passive 4-way flat trailer-light connector
Finished Connector Location: Mounted outside the vehicle at the concealed hitch, with the flat-4 secured by the Stealth magnetic holder when not connected to a trailer.
Availability: Offered with the compatible Stealth towing package, not as an active factory-style module installation
Connector Location: Mounted outside the vehicle at the concealed hitch, with the flat-4 secured by the Stealth magnetic holder when not connected to a trailer.
Model 3 trailer wiring is offered only as part of the original Stealth towing package. The passive lighting module is installed while the rear bumper is already removed, and the flat-4 finishes outside at the concealed hitch so every trailer-light function can be tested before reassembly.
1. Opening the Rear Electrical Access
The cargo trim and rear fascia are already removed for the hidden hitch, allowing the module and vehicle connections to be placed without cutting the factory lamp wiring.
2. Installing the Passive Lighting Module
The converter is mounted in a protected location and connected to the left and right lighting circuits with the specified vehicle-side connections.
3. Establishing Protected Power and Ground
The module receives a fused power feed and a clean structural ground, with every pass-through protected against abrasion.
4. Routing the Exterior Flat-4
The trailer lead is carried through the hitch wiring provision and secured outside near the removable receiver, away from heat and moving parts.
5. Fitting the Magnetic Connector Holder
The flat-4 and dust cover are positioned on the magnetic holder so the connector remains accessible when towing and can be tucked neatly against the hitch afterward.
6. Testing Before Final Reassembly
Running lights, brake lights, left turn, right turn, and ground integrity are verified before the bumper, sensors, lamps, and interior trim are restored.
Why We Use Passive Wiring: The completed circuit can be function-tested before the bumper is reinstalled. We do not install active trailer modules that may require programming or prevent complete verification during the appointment.
Plan for wiring now if towing may be in your future. Adding trailer wiring after a Stealth hitch has already been installed is considerably more expensive. The rear bumper must be removed again and the hitch must be modified to accept the wiring hardware, repeating much of the original hitch-installation labor.