Does a 2022 Toyota Highlander Need to be Flashed After Curt Aftermarket Wiring Installation?
Updated 06/02/2025 | Published 03/31/2025
Question:
Hello, on a 2022 Toyota Highlander we installed a 55245. Does the vehicles computer need to be flashed to turn on/ activate the wiring harness after it is installed?
asked by: Mike T
Expert Reply:
Hey Mike, thanks for reaching out!
You won't need to have the 2022 Highlander flashed after installing the Curt T-Connector # C55245. This installs on a vehicle that already has the factory tow package so it should activate after installing the fuse.
If you're having issues with the plug working after the installation, then I recommend removing the Curt plug and using a circuit tester to test the pins on the OEM plug to see if the functions are getting that far.
Let me know what you find!
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- CURT
more information >
Featured Help Information
Instructions
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on Custom Fit Vehicle Wiring
Mike T.
5/31/2025
Instructions don't mention a fuse that's noted in your comments. Where does this go? Other brands mention a converter-is there one and where does it go? None shown in the Curt C55245 picture. My Highlander is the LE AWD 3.5V6 gas 2022 without the tow package, but the oil coolers and under vehicle trailer wiring pigtail plug is there. Recent Highlander engines are equipped for towing but most don't have a hitch or added wiring which you sell. Note that the towing package option from Toyota is listed as: the hitch, 4 wire tail light harness and a separate converter wire with box, rear bumper panel inserts/plugs to allow the receiver higher thru the rear bumper-an expensive endeavor installed by Toyota(perhaps a $1500-$2500 project). I'm told the 7 wire system is even more costly and involved.