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Testers

CURT 58203 Vehicle-Side 5-Pin Flat Trailer Wiring Harness Connector Dust CoverCURT$32.99In Stock

Molded rubber construction resists weather and road elements
Universal fit for virtually any 5-way flat socket
Attachment loop prevents loss during storage or transport
Zero installation time, no tools required

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CURT 7-Way RV Blade Connector Tester (Packaged) Trailer Connector KitCURT$30.64In Stock

Integrated resistors compatible with Smart Tow technology
LED lights provide long-lasting, bright illumination
Orange plastic construction, zero installation time required

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CURT 58272 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester, OrangeCURT$30.93In Stock

Color-coded LEDs indicate function of each wire signal
Plugs into vehicle socket; no installation required
Identifies electrical problems in vehicle wiring or trailer
Integrated resistors compatible with Smart Tow systems

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CURT 4-Way Flat Connector Tester (Packaged) Trailer Wire TesterCURT$23.77In Stock

LED indicators light up for each functioning wire
Plugs directly into vehicle-side socket, no installation required
Diagnoses whether electrical faults are vehicle or trailer-side
Durable plastic construction with one-year limited warranty

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CURT 51521 Bench Test Trailer Brake Controller TesterCURT In Stock

Tests brake voltage, pedal activation, short-circuit, disconnect
Compatible with time-based and inertia-based controllers
Fits all CURT brake controller quick plugs
Includes voltmeter display and brake lamp indicator

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CURT 4-Way Flat Connector Tester Trailer Wire TesterCURT$23.11In Stock

Plugs into vehicle-side connector socket, zero installation time
Plastic construction, one-year limited warranty included
Diagnoses vehicle electrical vs trailer wiring problems quickly

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CURT 5-Way Flat Connector Dust Cover (Vehicle Side) Trailer Connector KitCURT$25.19In Stock

Molded rubber construction resists weathering and corrosion
Universal fit for virtually any 5-way flat socket
Attachment loop prevents loss when disconnected
Zero installation time, no tools required

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CURT 5-Way Flat Connector Tester Trailer Wire TesterCURT$20.99In Stock

Tests 5-way flat trailer connectors with LED indicators
Confirms tail lights, brake lights, turn signals, reverse
LED lights provide long-lasting, bright operation
Includes dust cover for connector protection

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CURT 57255 7-Way RV Blade Vehicle-Side to 6-Way Round Trailer Wiring Adapter with Tester, Center Pin Auxiliary PowerCURT$28.99In Stock

Center pin designated for auxiliary power connection
Includes LED tester to verify vehicle-side wiring function
Plug-and-play design requires zero installation time, no cutting
Dust cover protects connector from dirt and moisture

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CURT 57265 7-Way RV Blade Vehicle-Side to 6-Way Round Trailer Wiring Adapter with Tester, Center Pin Brake LightsCURT$15.99In Stock

Center pin designated for brake lights connection
Includes LED tester to verify vehicle-side wiring function
Plug-and-play design requires no cutting or splicing
Dust cover protects connector from dirt and moisture

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CURT 6-Way Round Connector Tester Trailer Wire TesterCURT$27.83In Stock

Plug-and-play design, zero installation time required
Diagnoses vehicle-side wiring vs. trailer electrical problems
Durable plastic construction with long-lasting LED lights

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CURT Electrical Adapter with Tester (6-Way Round Vehicle to 4-Way Flat Trailer) Trailer Wiring Adapter ConnectorCURT$21.99In Stock

Plug-and-play connection, no cutting or splicing required
Built-in LED tester confirms vehicle-side wiring function
Includes dust cover, one-year limited warranty

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Pinpoint a wiring fault before it leaves you stranded roadside. Choose a plug-in connector tester matched to your vehicle or trailer end, a bench unit for checking brake controllers, or an adapter with a built-in LED tester that confirms turn signals, brake lights and ground while you connect. Options include CURT and Hopkins.

Testers

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