Text Displays For Hopkins Tow Doctor Trailer Connector
Updated 12/15/2025 | Published 10/31/2024
Question:
What does U6 mean
asked by: Travis M
0
Expert Reply:
Hello Travis,
You were on the page for the Hopkins Tow Doctor Trailer End Test Unit # HM50928, so I believe that is what you were referring to. However, this unit does not display a "U6"; per the instructions (linked below), the LED display will show “OL” for overload which would indicate a load greater than 24 AMPs, “SC” for short circuit, & "LB" for low battery when the battery source drops below 9 volts
expert reply by:
Kyle S
0
Product Page this Question was Asked From
Hopkins Tow Doctor Trailer End Test Unit
- Electrical Tools
- Testers
- Tow Function Tester
- Hopkins
more information >
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Kate F.
12/15/2025
Hey Travis, did the info about the Hopkins Tow Doctor display codes clear things up for you? Knowing what you found could help others who see unexpected readings on their tester.