Features & Specs
Electrical and Air Brake Diagnostic Tool
Trailer Dr. is designed to help technicians quickly verify trailer lighting, air supply, and brake activation from a single position at the rear of the trailer.
Built for one-person operation, Trailer Dr. eliminates the need to climb into the cab or move the trailer during testing. Technicians can activate lights, supply air, and trigger brakes directly where problems occur, helping reduce missed faults, repeat inspections, and downtime.
Used by fleets, repair shops, and mobile service operators across the United States. The most compact, most powerful, and most rugged package in its class.
Key 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
- One-person operation via manual controls or wireless remote
Built for the Field
Smallest Unit. Most Power. No Compromises.
Competing trailer testers sacrifice size for power or require vehicle mounting. Trailer Dr. does neither.
Compact and Easy to Carry
15.2 lbs at 12 x 10 x 4 in. The smallest in its class. Works with any 115V outlet and air supply.
Most Powerful in Its Class
30A @ 12.8 VDC. 2/3rds more power than leading competitors.
Fully Waterproof
NEMA-rated polycarbonate construction. Built for cold, wet, dusty, and harsh field environments.
Standard Connection
7-way round pin connector. Plugs directly into any standard semi-trailer.
Overload Protection
Electronic overload protection with audible buzzer and indicator light. Automatically alerts if the circuit is overloaded, protecting the unit and the trailer.
Remote Confirmation Buzzer
When you press the remote at the rear of the trailer, an audible signal confirms the command was received. No guessing whether it registered.
Optional Upgrade
Rechargeable Remote with Work Light
For technicians working in low-visibility conditions, the optional rechargeable remote adds an integrated work light, keeping both hands free and both eyes on the trailer.
+$99
Ask About This UpgradeDeployment
Where Trailer Dr. Works
Most trailer testers are designed for one environment. Trailer Dr. works in all of them, including mounted to a service vehicle for fully mobile diagnostics.
Shop Floor
Plug into shop power and air supply. Diagnose trailer lighting, brakes, and air systems from the rear. No cab access, no moving the trailer.
Fleet Yard
Run from a nearby power and air source. One technician can work independently through an entire staged fleet.
Mounted to a Service Vehicle
Secure Trailer Dr. to your service truck. With onboard generator and air compressor, you have a complete mobile diagnostic station anywhere you drive.
Field Calls & Roadside
With a service vehicle supplying 115V power and air, Trailer Dr. handles field breakdowns and roadside calls without a shop in sight.
Technical Specifications
Built to Perform
Have Questions About the Specs?
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