WARN Winch Contactor | 76429 | 4-Post | RT40/XT40/4.0ci

Restore power circuit function to your RT/XT40 or 4.0ci winch with the WARN Winch Contactor (Part #76429). Genuine WARN OEM 4-post replacement contactor — the high-current relay that switches winch motor power on and off. Meaningful replacement for buyers whose winch has failed at the contactor rather than the motor itself.

⚠️ Compatible WARN Winch Models

This contactor is engineered specifically for the following WARN winches:

• WARN RT40
• WARN XT40
• WARN 4.0ci

Verify your existing winch model before ordering — contactors are not universally interchangeable across the WARN winch lineup.

What This Does

The winch contactor is the high-current relay that switches winch motor power on and off in response to your controller inputs (in/out/stop). It's the electrical intermediary between your controller and the winch motor. Meaningful failure symptoms suggesting contactor replacement:

• Winch doesn't respond to controller input despite good battery voltage
• Winch runs in only one direction (in OR out, but not both)
• Winch continues running after releasing controller — stuck contactor contacts
• Clicking sound with no motor operation
• Intermittent or erratic operation

RV & Trailer Winch Applications

WARN RT/XT40 and 4.0ci winches see common RV-adjacent use in:

• Toy hauler bed winches — loading motorcycles, ATVs, side-by-sides
• Cargo trailer winches — loading equipment or vehicles
• Utility trailer setups — general loading assistance
• Camper and RV recovery applications

4-Post Design

The 76429 uses the 4-post contactor architecture — verify your existing contactor is the 4-post configuration before ordering (some WARN winches use different post-count contactors).

Cross-Reference Part Numbers

• Manufacturer Part Number: 76429

⚠️ Professional Installation Recommended

Installation involves high-current DC electrical work — winch contactors switch heavy amperage during winch operation, so all connections must be secure and correctly torqued to prevent overheating or arcing. Installation should be performed by a qualified technician unless you have prior experience with winch electrical service. Always disconnect the winch battery before servicing.

Genuine WARN OEM

Key Features

• Genuine WARN OEM winch contactor
• Manufacturer Part Number: 76429
• For WARN RT40, XT40, and 4.0ci winches
• 4-post design
• Common failure point — restores winch operation when the motor is still good
• RV-adjacent applications: toy hauler bed winches, cargo trailer winches, utility trailer setups

Specifications

• Brand: WARN
• Manufacturer Part Number: 76429
• Type: Winch Contactor (High-Current Relay)
• Post Configuration: 4-post
• Compatible Winches: WARN RT40, XT40, 4.0ci
• Application: RV/Trailer winch service (toy haulers, cargo trailers, utility trailers, camper recovery)
• Warranty: Manufacturer's warranty