Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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1997 Ford Ranger
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1997 Ford Ranger
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Hooking up trailer wiring can be messy, but this harness keeps things simple. The Curt T-Connector plugs directly into the tail light connectors, so there’s no cutting or splicing wires. The plug-and-lead design hides neatly behind trim panels, giving a clean install that looks factory once it’s done.
Once connected, the built-in 4-pole flat connector powers your trailer’s running lights, turn signals, and brake lights. It’s the standard setup for small and mid-size trailers and works with add-on kits like the ETBC7 if you ever need a 7-way connection for trailer brakes or 12V power later on.
Modern vehicles use sensitive electronics, and direct splicing can cause problems. This harness includes a powered converter that isolates the trailer circuit from the vehicle’s wiring, helping prevent overloads or faults. It’s designed for vehicles without a factory tow package and keeps everything working safely and smoothly.
LED lighting is becoming standard on newer trailers, and this harness is built to handle it. It’s fully compatible with LED taillights, and when grounded properly to a clean metal surface, it delivers steady performance even when headlights or running lights are on. That means no flickering lights or weak signals—just consistent power every time you tow.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Chris J.
6/17/2016
Works great, fits vehicle perfectly.
Jenny N.
12/28/2022
I recommend a little more testing to see if the harness needs to be replaced. Checking the ground like you have already done is the best place to start. The next step would be to test the brake light function on the 4 way with a circuit tester. If there is a signal reaching the 4 flat then the issue would be on the trailer side and further testing on the trailer wiring would be the way to go. If there is no signal on the 4 flat then further testing on the vehicle side is needed. I would then suggesting testing the signal going into the module box and then out of the module. If there is no signal coming out of the module box then the harness needs to be replaced. We do have a good FAQ that can help show the best methods to test the wiring.
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Gregory
8/1/2025
Perfect! Harness is working flawlessly.