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Curt Manufacturing custom wiring harness extension, ten foot length, model 57010

Curt Manufacturing

Curt Manufacturing 57010 Custom Wiring Harness Extension 10 ft

SKU CH-3BYQ-Z01DY

A 10 ft custom wiring harness extension for trailer, plow and towing equipment

  • Product typeTrailer, Plow & Towing Equipment
  • Extends trailer wiring reach by 10 ft
  • Ready-to-install custom harness fits specific vehicles
  • Brand-new CURT part number 57010
  • Prop 65 chemical warning for California buyers
  • Durable construction for towing and plow applications

Custom Wiring Harness Extension

The Curt Manufacturing 57010 extends a vehicle wiring harness by ten feet. It suits owners adding trailer, plow or towing equipment that sits beyond the factory connector reach. The extension carries standard lighting and control signals without modification. Installation uses the existing connector style for a direct fit.

Practical limits of the wiring standard

A ten‑foot extension adds resistance and voltage drop proportional to wire gauge and current draw. Long runs can dim trailer lamps or weaken brake‑signal voltage if the source circuit is already near its limit. Corrosion at the extra junctions increases failure risk in salt or moisture exposure. The added length also creates more snag points on rough terrain.

California Proposition 65 chemical notice

This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Buyers who require components free of listed substances must select an alternative harness. The warning applies to the extension as supplied and does not change its electrical function.

How it compares

Measured against everything we stock in General Yard & Utility Tools, at today’s prices. Recalculated every night.

Price $114.99
Pricier than about 78% of the 1,487 comparable items (median $32.99).

Specifications

Product
Brand nameCURT
Product typeTrailer, Plow & Towing Equipment

Questions about this item

How do I know the 10 ft length is right for my trailer setup?

Measure from your vehicle socket to the trailer plug with the harness routed along the frame; the 10 ft extension adds exactly that reach so you can bridge any gap without excess cable dragging on the road.

What does the 10 ft extension actually change when I tow?

It lets you connect a trailer or plow whose wiring plug sits farther back than the factory harness reaches, eliminating the need to stretch or splice the original cable.

Does the 57010 use a standard trailer connector that fits my vehicle?

Yes, it follows the common 4‑flat trailer wiring pattern used on most light‑duty towing applications, so it plugs directly into the matching vehicle and trailer sockets.

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