Smart MUTT® (7-Way Round Pin)
Mobile Universal Trailer Tester


Smart MUTT® (7-Way Round Pin)
Mobile Universal Trailer Tester

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Smart MUTT® (7-Way Round Pin)
Mobile Universal Trailer Tester

(4 customer reviews)

A portable unit for commercial trailer lighting and ABS.

Find A Distributor
For International Customers
Distributor Information

To locate a distributor near you, please call 888-786-7899 or email us here.

International Sales

To place an order from outside of the United States, please call 888-786-7899 or email us here

Price $765.00
3 Year Warranty
30-Day Money Back Guarantee

In Stock
Lead Time: 2-3 Weeks


The Smart MUTT® is a Portable Trailer Light Tester for the Mobile and Commercial Trailer Repair Technician

Built to facilitate a one-man testing operation, the Smart MUTT® reduces guesswork and inspection time to prevent electrical failures that lead to expensive road calls and citations. This unit is designed to be used on 7-way round pin trailer connections.


Features and Benefits:

ELECTRICAL TESTING (12 Volt Operation)

  • Power lights: Manually, All-On, Auto Scan, or Remote Control
  • Audible and visual alerts: cross, open, overloaded and short circuit indication
  • Pulsar® mode allows diagnostic repair
  • Advanced trailer wiring diagnostics
  • Amperage readout and range (0-20 amps)
  • Cable testing
  • Ground failure detection: differentiates between wire and chassis ground


  • Remote control included tests all trailer electric circuitry, 200+ ft. range
  • Sync multiple (12) remotes to one unit

• 12-Button Remote Control (#MUT-RM12) • 5′ 7-Way Cable (#7900K-1) • 500mA Battery Charger (#CHR0001)

Read Our Full Trailer Testing Blog Here

4 reviews for Smart MUTT® (7-Way Round Pin)
Mobile Universal Trailer Tester

  1. David Geist (verified owner)

  2. Darin

    Lights Works really good for finding shorts ! Great to have for light !

  3. Keith

    Helpful Great product

  4. Eve Brown

    Five Stars Works very well

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Connection Type: 7-Way Round Pin
Power Input: 12/24V DC
Battery Requirements: Yuasa #YTX14 or Similar Recommended
Source Output: 20A @ 12/24V DC
Controls: Manual, Remote, Automatic
Material: Powder-Coated Steel
Weight: 15 lbs.
Dimensions: 12" L x 9.5" W x 9" H
Warranty: 3-Year Limited Warranty

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