The Only Smart Trailer Tester
Purpose-built hardware with real-time voltage, current & power telemetry, proportional electric brake control, and multi-layer safety protection. M18 battery powered with multi-user BLE — diagnose, control, and verify directly from your phone. No app install required.
Choose Your Kit
Every kit includes the same intelligent hardware — dual power sensors, electric brake controller, and safety monitoring. Pick the cable set that matches your trailer.
Light Duty / RV Kit
For recreational & light-use trailers
Everything you need to diagnose and monitor light-duty and RV trailers. Real-time telemetry, proportional electric brake control, and built-in safety protection — all from a web app on your phone.
- Real-time voltage, current & power telemetry
- Proportional electric brake control (PWM)
- Overcurrent & thermal safety lockout
- Powered by M18 batteries
- Multi-user BLE — connect multiple phones
- PWA web app — no download required
- On-device temperature monitoring
- 4-way flat & 7-way RV adapters
- Over-the-air firmware updates
- 1-year warranty
Complete Combo Kit
Best value — everything in one package
The full professional package. Real-time telemetry, proportional electric brake control, and safety lockout — with every cable adapter included.
- Real-time voltage, current & power telemetry
- Proportional electric brake control (PWM)
- Overcurrent & thermal safety lockout
- Powered by M18 batteries
- Multi-user BLE — connect multiple phones
- PWA web app — no download required
- On-device temperature monitoring
- All cable adapters (light + heavy duty)
- SAE J560 compliant heavy-duty adapter
- Over-the-air firmware updates
- 1-year warranty
Heavy / Commercial Kit
For commercial & fleet trailers
Built for the demands of commercial fleets. Real-time power telemetry, proportional electric brake testing, and overcurrent protection with industrial-grade cables.
- Real-time voltage, current & power telemetry
- Proportional electric brake control (PWM)
- Overcurrent & thermal safety lockout
- Powered by M18 batteries
- Multi-user BLE — connect multiple phones
- PWA web app — no download required
- On-device temperature monitoring
- Heavy-duty 7-way commercial cable
- SAE J560 compliant adapter
- Over-the-air firmware updates
- 1-year warranty
Tap and Go.
Instant App Launch.
No need to search the App Store or navigate menus. Simply tap your smartphone to the NFC logo on your TrailerCheck Pro device, and our native diagnostic app launches instantly.
- Available on Android (iOS coming soon)
- Instant device pairing and connection
- Frictionless experience for your technicians
Access TrailerCheck Pro on your favorite platform
Compare Kits Side-by-Side
Every feature at a glance. Find the perfect kit for your operation.
| Feature | Light Duty$399 | Heavy Duty$429 | Combo Kit$499 |
|---|---|---|---|
| Real-Time Telemetry (V/A/W) | |||
| Proportional Electric Brake Control | |||
| Overcurrent & Thermal Safety Lockout | |||
| Multi-User BLE (Multiple Phones) | |||
| On-Device Temperature Monitoring | |||
| PWA Web App (No Install) | |||
| Cable Type Auto-Detection (Coming Soon) | |||
| Multi-Brand Battery Support (Coming Soon) | |||
| BLE 5.0 Connectivity | |||
| IP67/IP69K Waterproof Rating | |||
| OTA Firmware Updates | |||
| 4-Way Flat Adapter | — | ||
| 7-Way Round Adapter (RV) | — | ||
| 7-Way Commercial Cable | — | ||
| SAE J560 Compliance | — | ||
| Warranty | 1 Year | 1 Year | 1 Year |
Trusted by Operators Nationwide
Hear from the professionals who rely on TrailerCheck Pro every day.
“This tool is a massive time-saver. I hooked the Pro Case up to my 53-footer and instantly pinpointed a wiring fault I'd been chasing for weeks. An absolute must-have for any owner-operator.”
Mike R.
Owner-Operator, Texas
“I mostly use it to check my travel trailer before long trips. Nice not having to ask someone to stand behind the trailer while I hit the brakes. The Bluetooth range is solid — works from the cab.”
Greg K.
RV Owner, Colorado
“We have about 40 trailers and our guys were spending way too long on pre-trip electrical checks. This sped things up quite a bit. Still getting the newer drivers comfortable with it, but the experienced techs love it.”
Dave M.
Fleet Manager, Ohio
“We started using these on our production line for final electrical sign-off. It's caught a handful of wiring issues that would've shipped otherwise. Simple enough that our line guys picked it up without much training.”
Jason T.
Quality Manager, Trailer Manufacturer — Indiana
“I'm wiring 5 to 10 trailers a day. Having the case right there to test my work as I go means I'm not waiting on the QC guy to find my mistakes. The proportional brake testing is spot on.”
Marcus D.
Wiring Tech, Trailer Manufacturer
Frequently Asked Questions
Everything you need to know before you buy.
TrailerCheck Pro works with virtually all trailer types — from light-duty utility trailers and RVs to heavy commercial semi-trailers. The Light Duty kit includes 4-way flat and 7-way round adapters for recreational use. The Heavy Duty kit includes SAE J560 compliant connectors for commercial fleets.
The TrailerCheck Pro case is powered by Milwaukee M18 batteries. The firmware includes built-in battery protection with low-voltage cutoff and audible countdown warnings to prevent over-discharge. Simply snap in any M18 battery for all-day continuous testing. DeWalt 20V MAX and Bosch 18V support coming soon.
The case uses Bluetooth Low Energy (BLE) 5.0 for a reliable wireless connection. Multiple phones can connect simultaneously — so your entire crew can monitor and control from their own devices. For instant access, tap your phone against the NFC logo on the case to launch the web app, or navigate directly in your browser. No app install required — it runs as a Progressive Web App (PWA) directly in your mobile browser.
All TrailerCheck Pro kits include a 1-year warranty. The warranty covers manufacturing defects, component failure, and waterproofing integrity. Cable wear from normal use is not covered.
Absolutely. We offer a 30-day no-questions-asked return policy. If TrailerCheck Pro doesn't meet your needs, ship it back for a full refund. We'll even cover return shipping.
Firmware updates are delivered over-the-air (OTA) through the web app. When connected via Bluetooth, the app will notify you of available updates. One tap to download and install — the entire process takes about 60 seconds. No cables or computers required.
Yes. We work directly with trailer manufacturers providing volume pricing and custom solutions for end-of-line testing and certification. Scroll down to the "Building Trailers?" section or contact us at sales@trailercheckpro.com for custom quotes.
Building Trailers? Let's Talk.
We work with trailer manufacturers providing volume pricing and custom solutions for end-of-line testing. Whether you're building 10 trailers or 10,000 — TrailerCheck Pro is the perfect tool to test, diagnose, and certify every trailer before it leaves your facility.