Test Trailer Lights Anywhere — No Tow Vehicle Needed
Check N Tow is a shop-grade, battery-powered trailer light tester built for fast, accurate trailer diagnostics without hooking up to a truck. Test 7-way RV blade and 4-way flat trailer lights, activate multiple functions at once, and simulate real vehicle signaling — including brake override and turn flash.
Hand-assembled in the USA • Serviceable design • 30-day satisfaction guarantee • 1-year limited warranty
Built for Real Trailer Testing
Whether you work on RVs, utility trailers, equipment trailers, fleet trailers, or campground units, Check N Tow gives you a faster way to test trailer lights without tying up a tow vehicle.
Plug in the trailer, snap in a compatible tool battery, and control each light function from the tester. Turn on one circuit at a time, or test multiple functions together for a faster walk-around inspection.
Built for Milwaukee M18, DeWalt Type 2, and Snap-On battery setups. Battery not included.
Why Check N Tow Stands Apart
Not all trailer testers are built the same. Cheap test boxes may work for basic checks, but Check N Tow is built for people who need something stronger, more useful, and easier to keep working.
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Test 7-way and 4-way trailer plugs
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Run multiple light functions at the same time
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Simulate real vehicle signaling, including turn flash and brake override
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Built with automotive relays, a flasher relay, and circuit protection
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Works with LED and incandescent trailer lights
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Hand-assembled and tested in the USA
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Designed to be serviced instead of thrown away
Our goal is simple: make this the last trailer light tester you need to buy.
Smart, Rugged, Ready When You Are
Check N Tow is built for fast, one-person trailer light testing wherever the work happens — in the shop, driveway, campground, yard, or job site. Plug in your trailer, connect a compatible tool battery, and control each lighting function from the tester without needing to hook up a tow vehicle.
Built-In 12V Accessory Power Port
Check N Tow includes a built-in 12V accessory power port for added convenience in the shop, driveway, campground, or job site.
Use it with compatible low-draw 12V accessories such as phone chargers, small work lights, and other approved 12V devices. It is one more way Check N Tow gives you more utility from the batteries you already own.
