Product Details
- Brand: Tekonsha
- Model: 118729 118144
- Includes: T-One T-Connector Custom Harness, Mounting Bracket
Compatibility Chart
Description
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Trailer Wiring and Bracket For 19-24 Toyota Corolla Hatchback 17-18 Corolla iM 2016 Scion iM Plug & Play 4-Flat Harness Install Notes
Installation Instructions for T-One® T-Connector for Scion iM
Part Numbers:
- 118729
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or 10mm Wrench
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
- Phillips Head Screwdriver
- Test Probe
Step-by-Step Instructions:
-
Open the Hatch:
- Locate the vehicle wiring inside the rear cargo area by partially removing all floor coverings, cargo trays, plastic threshold cover, access panels, and trim panels.
- Be careful not to damage any clips or screws.
-
Connect the Driver-Side T-Connector:
- Separate the vehicle’s wiring connectors on the driver’s side without breaking the locking tabs.
- Insert the T-Connector end with the yellow and brown wires between the vehicle wiring connectors and lock into place.
- Ensure all connector surfaces are clean and free of dirt.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector containing the green and red wires below the threshold cover to the passenger’s side taillight housing.
- Repeat Step 2 using the T-Connector with the green and red wires.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole and secure the white wire using the provided eyelet and screw.
- Clean dirt and rustproofing from the area.
Caution: Verify the area behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.
-
Mount the T-Connector’s Black Box Module:
- Locate a flat, out-of-the-way surface and mount the black box module to prevent damage or rattling.
-
Route the Black Power Wire:
- On the driver’s side, locate the black 12-gauge power wire from the T-Connector box and attach the provided black wire.
- Route the black wire along the exterior frame or existing wiring to the engine compartment up to the battery.
- Avoid areas that may pinch, cut, or break the wire.
Warning: Avoid routing the wire near hot pipes, heat shields, fuel tanks, or other hazardous points.
-
Connect the Power Wire to the Battery:
- Disconnect the vehicle’s Negative (-) battery cable.
- Remove the fuse from the yellow fuse holder.
- Attach the ring terminal to the Positive (+) battery cable and secure it.
- Connect the other end of the fuse holder to the black 12-gauge wire using the provided yellow butt connector.
Warning: Follow all warnings and precautions related to the tow vehicle’s battery.
-
Secure the Wiring Harness:
- Use the provided cable ties to secure the remainder of the T-Connector harness.
- Avoid areas that may pinch, cut, or melt the wires.
-
Reconnect the Battery and Test:
- Reconnect the vehicle’s Negative (-) battery cable.
- Install the 15-amp fuse into the fuse holder.
- Test the installation with a test light or trailer.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and other removed items.
- Ensure no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
Specifications:
- Max. stop/turn light: 2 per side (4.2 amps)
- Max. tail lights: 7.5 amps
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
- Always wear safety glasses and follow safety precautions during installation.
Manufacturer Notes:
- Refer to the vehicle owner’s manual and the instruction sheet for additional details.
- Store these instructions for future reference.
Installation Instructions for T-One® T-Connector for Scion iM
Part Numbers:
- 118729
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or 10mm Wrench
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
- Phillips Head Screwdriver
- Test Probe
Step-by-Step Instructions:
-
Open the Hatch:
- Locate the vehicle wiring inside the rear cargo area by partially removing all floor coverings, cargo trays, plastic threshold cover, access panels, and trim panels.
- Be careful not to damage any clips or screws.
-
Connect the Driver-Side T-Connector:
- Separate the vehicle’s wiring connectors on the driver’s side without breaking the locking tabs.
- Insert the T-Connector end with the yellow and brown wires between the vehicle wiring connectors and lock into place.
- Ensure all connector surfaces are clean and free of dirt.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector containing the green and red wires below the threshold cover to the passenger’s side taillight housing.
- Repeat Step 2 using the T-Connector with the green and red wires.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole and secure the white wire using the provided eyelet and screw.
- Clean dirt and rustproofing from the area.
Caution: Verify the area behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.
-
Mount the T-Connector’s Black Box Module:
- Locate a flat, out-of-the-way surface and mount the black box module to prevent damage or rattling.
-
Route the Black Power Wire:
- On the driver’s side, locate the black 12-gauge power wire from the T-Connector box and attach the provided black wire.
- Route the black wire along the exterior frame or existing wiring to the engine compartment up to the battery.
- Avoid areas that may pinch, cut, or break the wire.
Warning: Avoid routing the wire near hot pipes, heat shields, fuel tanks, or other hazardous points.
-
Connect the Power Wire to the Battery:
- Disconnect the vehicle’s Negative (-) battery cable.
- Remove the fuse from the yellow fuse holder.
- Attach the ring terminal to the Positive (+) battery cable and secure it.
- Connect the other end of the fuse holder to the black 12-gauge wire using the provided yellow butt connector.
Warning: Follow all warnings and precautions related to the tow vehicle’s battery.
-
Secure the Wiring Harness:
- Use the provided cable ties to secure the remainder of the T-Connector harness.
- Avoid areas that may pinch, cut, or melt the wires.
-
Reconnect the Battery and Test:
- Reconnect the vehicle’s Negative (-) battery cable.
- Install the 15-amp fuse into the fuse holder.
- Test the installation with a test light or trailer.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and other removed items.
- Ensure no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
Specifications:
- Max. stop/turn light: 2 per side (4.2 amps)
- Max. tail lights: 7.5 amps
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
- Always wear safety glasses and follow safety precautions during installation.
Manufacturer Notes:
- Refer to the vehicle owner’s manual and the instruction sheet for additional details.
- Store these instructions for future reference.
Technical Support:
For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.
Warranty Information:
For complete warranty instructions, please download the full installation PDF.
Note: Store the 4-flat connector in the rear cargo area when not in use to prevent damage.