Trailer Dr.
Electrical & Air Brake Trailer Diagnostic Tool
Portable semi-trailer light and air brake tester built to handle real shop conditions. Fully waterproof, 15.2 lbs, and built for one-person operation. Verify lighting, air supply, and brake activation from the rear of the trailer without a truck, cab access, or a second person.
- Fully waterproof NEMA-rated enclosure, built for wet shops and outdoor use
- One person does the work of two. No cab access, no second technician needed
- Hangs from the trailer gladhand couplings during testing, keeping it positioned at the rear while you operate the remote
- 15.2 lbs with built-in handle. Move between trailers in any shop, fleet yard, or roadside call
- 1-year warranty · 30-day free trial (buyer covers return shipping)
Optional Add-On
Rechargeable remote with integrated work light: +$99
Not sure about it yet? See the full specifications and capabilities or schedule a demo and see it in action.
Deployment
Works Wherever You Work
Trailer Dr. brings the test to the trailer, not the other way around. It performs in every environment technicians actually work in.
Shop Floor
Plug into shore power, hang Trailer Dr. from the gladhand couplings, and run full electrical and air brake diagnostics from the rear of the trailer with the remote. No moving the trailer, no calling someone to the cab.
Fleet Yard
Walk the yard and test trailers in line. One technician handles fleet maintenance independently, with no vehicle access, no second person, and no waiting.
Field Calls & Roadside Repair
With a service vehicle providing 115V power and air, Trailer Dr. handles roadside trailer repairs and field calls without needing a shop.
Mounted to a Service Vehicle
Mount Trailer Dr. to your service truck. With vehicle air and power available, you have a fully capable mobile diagnostic station. No shop required, anywhere you drive.
How We Compare
Trailer Dr. vs. Other Trailer Testers
Most trailer testers limit what you can do from the remote and require a permanent vehicle mount. Trailer Dr. gives you full control from the rear of the trailer, in any environment, with no truck required.
Proven in the Field
Built to Last Where Others Fail
Trailer Dr. is built for the conditions technicians actually work in: wet shops, outdoor yards, and roadside calls. When other tools fail, Trailer Dr. keeps running.
NEMA-Rated for Wet Conditions
Trailer Dr. carries NEMA ratings 1, 2, 3, 3R, 3S, 4, 4X, 6, 6P, 12, and 13, covering everything from dripping water to hose-down and standing water conditions. No other portable trailer tester matches this rating.
One Person. No Cab. No Wait.
With full remote control from the rear of the trailer, one technician does work that used to require two. No running to the cab, no calling someone to the truck. The labor savings alone pay for the tool.
Customer Story
A fleet maintenance operation was going through IPA trailer testers regularly. Their shop floor collected water, and the units kept shorting out, leading to frequent breakdowns, repairs, and replacement costs. They switched to Trailer Dr. Within a year, they had purchased three units and retired every competitor tool in the shop. Trailer Dr. is now the only tester they use across their entire fleet.
Fleet maintenance company, USA
Capabilities
What Trailer Dr. Tests
- Brake, turn, running, and marker lights
- Electrical connections and wiring faults
- ABS fault code reading via industry-standard blink codes. Works on all major trailer brands. No software, no subscriptions, no proprietary dongles required.
- Air supply to the trailer (125 lb max, self-regulated)
- Air leaks
- Brake activation and air brake response
Technical Specifications
Built to Perform
Ready to Order or Have Questions?
Speak directly with the people who build Trailer Dr., or try it free for 30 days.