What Does TM and EB Mean on a 7-Way Trailer Plug
Updated 11/13/2025 | Published 10/23/2025
Question:
Need to know what eb and tm stands for on a female trailer adapter 7 blade means.
asked by: Timothy
0
Expert Reply:
Thanks for your question, Timothy.
Usually on a trailer plug the EB would stand for electric brakes and TM would stand for tail marker (or the running lights). Hopkins part # HM45MV and other similar plugs will have labels like this on them so indicate which pin is for what function.
expert reply by:
Gwendolyn Y
0
Hopkins HM45MV
(click to enlarge)
(click to enlarge)
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Gwendolyn Y.
11/13/2025
Hey Timothy, did the info about the EB and TM labels help you sort out the wiring on your trailer adapter? Knowing what worked could help others trying to read those markings too.