Skip to content
TOUGH JOBS DONE RIGHT: Serious Tools Up to 50% Off. Shop the Deals >
Northern Tool Equipment Logo TextNorthern Tool Equipment Logo text link to Home.

Free Gift Card on All Orders Over $100 See Details

Free Gift Card Details

$100 Order
$10
gift card
$250 Order
$25
gift card
$500 Order
$50
gift card
$1000 Order
$100
gift card
  • 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.
  • Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
  • E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
  • Free e-gift cards expire 10/01/26.
  • Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
  • Valid online and in participating retail stores.
  • Limited-time offer. Subject to change without notice.
Print

Ultra-Tow 7- and 4-Way Circuit Tester

Item# 578224
"Ultra-Tow 7- and 4-Way Circuit Tester, Model# DBP7+4"
Top Seller
Ultra-Tow 7- and 4-Way Circuit Tester

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Ultra-Tow 7- and 4-Way Circuit Tester

Click or Tap image to Zoom

$26.99

  • Shipping: 

    Available now
    $19.99 Same Day

  • Store Pickup: 

    3 in stock at Fredericksburg VA - Pickup in under 1 hr

See full description

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Warranty

  • Compare

Product Summary

Tests power supply from tow vehicle to trailer and determines if vehicle is properly wired. Tests both 7-way round and 4-way flat tow plugs. Plug into the vehicle's tow plug and operate lights, brakes and turn signals to test circuits. Reduces trouble shooting time. Tester only.

Key Specs

AttributeSpecification

item#

578224

Brand

Ultra-Tow

Manufacturer's Warranty

1 year limited warranty
AttributeSpecification

Ship Weight

0.26 LB

Product Type

Circuit Tester

Reviews

Questions & Answers

39 Reviews This action will navigate to reviews.

Questions

1–3 of 3 Questions  
Sort by:

  1. European?

    1 answer

    1. If the vehicle has a 4-way flat connector or a 7 pin RV trailer plug, it will work for testing the circuit.

      Helpful?

  2. how is the tester wired? which post connects which light?

    1 answer

    1. The tester will connect to a 4-way flat connector and a 7 pin RV trailer plug. This will work to test the right and left turn/brake, 12-volt auxiliary, tail lights, electric brakes and the backup light.

      Helpful?

  3. Will this device also test electronic trailer brakes?

    1 answer

    1. The circuit tester will be able to test the power to the electric brakes.

      Helpful?

Warranty

Manufacturer's Warranty

1 year limited warranty

Recently Viewed Items

This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.

Ultra-Tow 7- and 4-Way Circuit Tester
4.3 out of 5 stars. 39 reviews

Ultra-Tow 7- and 4-Way Circuit Tester

Item # 578224

$26.99