Truck Repair: help, stop gap, flash lights

Question
  
hello I'm working with a freightliner 94 with m11 330, and turns the light at the start of shutdown, lasts 30 seconds on and then off. and repair can help me thank you for your time

Answer
You did not say if the lights on and off have any effect on the engine. If it is a celect engine, you need to troubleshoot the problem.
Firstly, if you have fault code indicator in your cab, switch it on when engine is not running and observe the code displayed through intermittent flash lights. usually it is a 3 digit code where each digit is displayed quickly followed by intermittent stop as a stop gap. if you are able to read this code, then let me have it so I can help you interprete it.
Secondly, check the resistance of your shutdown solenoid, if 12V about 14 ohms and if 24V it is about28 ohms.

Regards,