| 摘要 |
A method for testing lighting systems in tractors and trailers. To use the tester to check small trailers; connect male cord from trailer to female connection on tester. Connect 12V power supply cord to power supply, connect power supply to tester to check lighting system. To use tester to check semi-trailers: connect tester to the 7-way female connection in the front of the semi-trailer. Connect 12V power supply cord to power supply, connect power supply to tester to check lighting system or Abs. To use tester to check truck or tractor: connect supply cord from truck or tractor to 7-way female connection on tester. No power supply required. Activate tractor switch on tester. You will now be able to test each lighting system on the truck or tractor. The LED light on tester will indicate if system is working properly or not.
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