Can Hopkins Tow Doctor Test Flat Tow Wiring

Updated 05/07/2025 | Published 05/03/2025

Products Featured in This Question

Hopkins Tow Doctor Vehicle End Test Unit

(47)

$259.50

Hopkins Tow Doctor Trailer End Test Unit

(47)

$512.32

Question:

Will this tester work for checking my motorhome and tow vehicle flat tow wiring?

asked by: Wayne F

Expert Reply:

Hey Wayne! What kind of motorhome do you have? The Hopkins Tow Doctor # HM50918 will work with your flat tow wiring. The connectors are all the same and part of a 12V system so you can plug it into the connector on your motorhome and test to make sure everything is working properly.

expert reply by: Robin H

Hopkins Tow Doctor
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Wayne F.

5/6/2025

I have a newmar dutch star

Robin H.

5/7/2025

@WayneF awesome! Let us know if you need anything else while you're out there traveling this summer.

Wayne F.

5/7/2025

@RobinH What is the difference between HM50928 and HM50918? My main objective is to test the flat tow wiring on my 2023 GMC truck that I tow behind my motorhome.

Robin H.

5/7/2025

@WayneF the # HM50928 uses a 12V battery so you could test the wiring on your truck without the motorhome. Or you could check the wiring on a trailer without the tow vehicle. Based on what you're saying this is what you need.