CURT Automotive Electrical Plug: 4-Way, Rubber, 16 ga Wire Gauge, Trailer and Tow Vehicle
SKU 3G-OTH-487788
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Frequently Asked Questions
What is CURT 58040 4-Way flat connector used for?
The CURT 58040 is a 4-way flat connector used to link a tow vehicle's electrical system to a trailer's lights, including turn signals, brake lights, and tail lights. It is commonly used on utility trailers, boat trailers, and small RVs for safe road operation.
What are the specifications of CURT 58040?
The CURT 58040 is a 4-way flat connector with a rubber housing and 16-gauge wire. It is designed for both trailer and tow vehicle applications. The manufacturer part number is 58040. This connector supports standard trailer lighting functions.
Where to buy CURT 58040 worldwide?
3G Electric supplies the CURT 58040 4-way flat connector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this part for your fleet or maintenance needs.
How to install CURT 58040 4-way flat connector?
To install the CURT 58040, connect the 16-gauge wires to your vehicle's trailer wiring harness using butt connectors or solder, matching color codes (brown for tail, yellow for left turn, green for right turn, white for ground). Secure the rubber plug to prevent moisture ingress.
Used in
Common applications for CURTCURT Products
3G Electric supplies CURT fleet and vehicle maintenance. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









