Experience has shown that using a RBE Electronics trailer tester for troubleshooting can save as much as 50 percent of the time required finding and correcting lighting circuit problems. Thousands of testers are in use today by all types of technicians from the RV industry to the Tractor/Trailer industry.

Besides our low prices, here are common features that stomp out all other competitive brands:

1) Testers are compact and can easily be carried to the job site.

2) Most models test both the tractor (vehicle) AND the Trailer.

3) Testers are fully protected from short circuits.

4) RBE’s testers detect open circuits, ground shorted circuits, cross shorts between circuits and reversed wiring.

5) RBE’s testers test circuits such as turn signals using a flasher to simulate actual tractor-trailer connections. In addition to testing circuits per actual operation, the tester monitors excessive turn signal current and trips a breaker should the tester detect a partial short. This is important because the flasher unit in the tractor can easily be damaged with excessive current in the turn signal circuits.

6) The TH21 series and THT series include an amp meter to monitor current draw for each test.

7) All TH and THT testers include a master power switch to disconnect power should the technician be interrupted prior to completion of the testing. This eliminates having to unplug the tester for safety purposes and allows the technician to leave the circuit he was testing activated so he/she can easily resume testing.

8) The TH21-ST and the TH21-SB and THT testers all include a dual voltage select switch. This switch allows the testers to be operated with either internal power or from an external power source.

9) All testers include easy to understand test instructions located on the inside cover of the tester. No worrying about losing the instructions!

10) All testers include an isolation diode to prevent voltage feedback from the vehicles lighting circuits entering the testers power supply.

11) The TH21-SB and TH21-ST, and the THT series testers all detect and display ABS brake signals from the tractor.

12) The testers are housed in a tough plastic case. The plastic case prevents shorting out batteries should the battery become in contact with the external battery or other power source.

13) All testers are fully warranted for one year from defects in parts and workmanship.

14) All circuit components in testers are heavy duty rated.