Glensts Posted January 17, 2014 Share Posted January 17, 2014 On one of my ch 613, 1997 ,I started truck, it was about -20 C out, about 0 F. Fired up perfect, lights work but heater didn't,Also noticed high idle and cruise wouldn't work,nor air buzzer.Pyrometer was at 900, and if you turned on heater fuel gauge went down.Radio and CB posts worked, everything else seemed normal.So only had to haul 2 miles and unload, 2 hours later everything worked normal,today it still works normal.Thinking ground but which one? where would be most likely place to look?Glen Quote Link to comment https://www.bigmacktrucks.com/topic/34270-97-mack-ground-issue/ Share on other sites More sharing options...
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