My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

SG Tool Aid 21300 Heavy Duty Circuit Tester 18-36 Volt System

Manufacturer

Picture for manufacturer SG Tool Aid

Part Number

21300
14 reviews
Sale Price

$7.74

2 left at this price

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The SG Tool Aid 21300 Heavy Duty Circuit Tester is a professional-grade diagnostic tool designed for high-voltage applications in commercial trucks, heavy equipment, and agricultural machinery. This robust tester handles both AC and DC electrical systems up to 36 volts, making it ideal for troubleshooting complex electrical circuits in tractor-trailers and industrial equipment.

Key Features:

  • Tests AC or DC wiring circuits up to 36 volts
  • Designed for checking series-parallel switches and solenoids on tractor-trailer starter systems
  • Essential tool for trucking, farming, heavy equipment, and trailer service professionals
  • Includes 48-inch ground wire for extended reach and versatility
  • Heavy-duty construction built to withstand demanding shop environments

This circuit tester is specifically engineered for the unique electrical demands of 18-volt, 24-volt, and 36-volt systems commonly found in commercial vehicles and industrial equipment. The extended ground wire provides the flexibility needed to test hard-to-reach circuits and components in large vehicles and machinery.

Awesome job guys! communication was super fast! price was cheap and shipping fast! definately do buisiness with these guys again

For the over-the-winter garage storage of my 911, the Rail Ramps Flatstopper product has eliminated the need to move the car over the winter in order to avoid the tires developing flat spots.

Easy to make purchase options and update to checkout

Quick, Fast, Easy. Item I wanted was right there!

Great

Great service

super service and best price on the net

I was happy to find this item that was unavailable from several web stores.

As the merchant name suggests, the process of my purchase was straight forward and simple. I do not need anything else , so next time I will shop here again.<br>Thanks.<br>Julio Gonzalez

great price ,lowest on the net ,instock item was a plus thanx

So far, so good. Good prices.

I placed my order for an Autometer Shift Light and it was shipped the same day. I was provided a FedEx tracking number in the shipping confirmation email. <br><br>Very easy to select what I wanted to buy and the check out process was simple and quick.

easy shopping - fast check out ==== THANK YOU

Very fast shipping! I got an email saying it was shipping 2 days after I placed my order, when I checked the tracking it was already delivered to my house! Will shop again.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy