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  • The promotion will be automatically applied on the Shopping Cart page.
  • To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
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  • Free e-gift cards expire 10/01/26.
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  • Valid online and in participating retail stores.
  • Limited-time offer. Subject to change without notice.

Product Summary

The Hopkins Tow Doctor Vehicle Wire Harness Test Unit is designed for one person to test a tow vehicle for proper wire harness installation and for key functions like ground, auxiliary power lead, brake controller, directional and backup lights — all without a second person at the rear. Adapts to 4-way flat and 6-round or 7-way RV blade. Includes heavy-duty 20ft. extension cord.

What's Included

  •  (1) Vehicle side test unit

Key Specs

AttributeSpecification

item#

650918

Brand

Hopkins Towing Solutions

Manufacturer's Warranty

3 months parts / 3 months labor

Ship Weight

6.05 LB

4-Way Flat Capable

Yes

6-Way Round Capable

Yes

7-Way Round Capable

Yes
AttributeSpecification

Tests Turn Lights

Yes

Tests Brake Lights

Yes

Tests Tail Lights

Yes

Tests Back-Up Lights

Yes

Tests Ground Wire

Yes

Tests Brake Controller

Yes

Tests Auxiliary Power

Yes

Warranty

Manufacturer's Warranty

3 months parts / 3 months labor

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.