jjroxus Posted February 7 Share Posted February 7 I need advice on how to read the error codes without going to the Cummins shop. I thought I read some where that there was a way to have the dash warning light and the stop light blink out the error codes? The coach has a Cummins ISM 500. Do I need to purchase diagnostic or monitoring software -Silverleaf or Bluefire? The warning light came on about a month ago and stays on when the engine is running. I have not taken the coach out on the road since this happened as I’ve been working on the leveling system and other issues. There doesn’t seem to be an obvious problem the engine starts up fine and the transmission is working. I had been just starting up the coach in the driveway to air the system up and troubleshoot HWH issues. Now the HWH system is repaired and its time to get the warning light figured out. I checked all the fluid levels and the low coolant sensor- no problem there. Link to comment Share on other sites More sharing options...
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