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Wiring a trailer often means tracking down the right wires and hoping you don’t cut the wrong one. This Curt T-Connector skips all that. It plugs inline with your vehicle’s tail light connectors, giving you a clean 4-flat trailer plug without splicing or tapping into factory wiring. The connectors use locking tabs for a secure fit, so once they’re clicked in, they stay put.
The harness tees into the existing wiring and keeps your vehicle lights working exactly as before. It only uses the brake, turn, and running light circuits to power the trailer lights, leaving other systems untouched. You get a reliable trailer connection without interfering with wipers, interior lights, or any other electrical features.
This harness includes a built-in converter that manages the power for your trailer lamps. It’s rated for 3 amps per circuit for stop and turn lights and 7.5 amps total for running lights. That’s enough capacity for most small to mid-size trailers, giving you steady, consistent lighting on every trip.
Good grounding makes all the difference in trailer lighting. The Curt harness grounds directly to a clean metal surface to keep signals strong and predictable. When used with corrosion-free connectors on the trailer side, it helps prevent flickering lights or power drops that can happen with poor connections.
The 4-way flat plug provides standard lighting functions—running lights, turn signals, and brake lights—for safe towing day or night. It’s the common connector style for most light-duty trailers, so you can hook up and go without extra adapters or rewiring.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Quick order turnaround time. Great job guys
Couldn't b any simpler. Appears to be high quality.
Good product. Fairly easy install. Than ks.
Product easy to install and worked well. Hardest part was unplugging vehicles cables.
failed to work
Still working great a year later!
Too short to use properly on a 1997 rav 4. Ultimately the wire does reach across from passenger to driver side, but I found that it needed to be 3-4” longer. Definitely still usable, but a few more inches would be very helpful.
easy to install. just plug and play
Very easy installation. Start to finish 90 minutes. Works flawlessly.
This was the perfect replacement part for my 1998 Rav4 and was easy to install.
It works great!
worked great no cutting plug and play lights as easy as 123.
The only way to install trailer hook up in any vehicle!
Plug and play!
Very well packaged, fast shipping, everything worked perfectly once I figured out what I was doing wrong. Very happy with this product and the service.
Seams fine and does the job, but taking off 2 stars because the wiring for the left side is too short to route under the plastic step plate and instead would need to go unprotected under the rear carpet.
perfect fit!
Fit and finish are perfect. 10 minutes for hitch installation! Trusted seller. Now on to the wiring harness. :-)
The wiring harness was easy to install. It works great when I pull my jet ski trailer.
I ordered this wiring kit with a hitch for my 97 Toyota RAV4. Super easy plug n play setup. Took me about 20 minutes but most of that time was taking out screws. No cutting and taping anything which made it super easy!!!
Glad I went with etrailer. Well thought out. Good company
Installed easily. Would have been nice if yellow lead was longer to allow for a better placement of receiver box for longer lead to trailer. Also, not sure if it’s my vehicle (1999 Toyota RAV4) or the cables, but the hazards and most lighting can’t be seen without the car’s engine on.
etrailer was great with fast shipping and accuracy with order.
Excellent product! This was the only harness that I could find that was truly plug and play. No splicing required. I went ahead and bought a trailer light kit from them for my 5x8 trailer. Shipping was very quick. I’d give them a sixth star just for that if I could.
Have since sold the Vehicle I put this harness on. But used it to pull a trailer on a camping trip and it worked good. Had to extend the back tail light Wire because there wasn’t enough wire so that’s my only complaint. Other than that it worked great
Received item just a little after the noon hour and had installed (solo) and wiring harness finished before 5 pm the same day. Everything fit and works perfectly. Had been contemplating a trailer hitch for my old 1997 Toyota RAV4 for awhile but thought it would cost too much. This set up was perfect and much less than I expected or was willing to pay.
Alvin H.
3/21/2018
Great, once I figured out that my vehicle would not power standard lights. Switched to LED and everything worked out fine.
On time shipping and T-Connector was easy to install. Excellent communication and instructions. Works great!
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Jeffrey
5/16/2022
Works fine. A good choice