The Path to a Fast & Accurate Diagnosis

Veteran and family owned in the great state of Tennessee, Trailer Test Box units are designed and made in the USA. After years of aviation flightline troubleshooting, aircrew, and electrical/avionics manufacturing experience and education, our owners ended up in the towable business. During that time, the shops were spending too much time accurately diagnosing components on these units. Trailer Test Box was born and is above all other offered solutions in the market today, at an affordable price.

We are now offering our units, and other often-used general components to the public in our store. During 2022 and forward, we guarantee value will be added to your pro-consumer garage or professional shop with our products. Contact us for any questions or assistance.