VPZINC Posted July 12, 2013 Share Posted July 12, 2013 2007 CL-733 Cummins ISX. Washed it today and on a cruise afterwards the lightning bolt on the dash would come on then go off every couple of minutes. The truck ran fine, no power problems, gauges all worked with no problems. Only the exterior was washed, nothing inside got wet. I know it's vague but is there anyone that can tell me what's wrong? Or is there a way I can pin point what it wrong? Thanks,Victor Quote 87 RD 686SX07 CL-73306 Granite CV-713"Old Macks never die, just get new generations of drivers" Link to comment https://www.bigmacktrucks.com/topic/31899-lightning-bolt-comes-on-then-turns-off/ Share on other sites More sharing options...
towjoe Posted July 13, 2013 Share Posted July 13, 2013 Ya, real vague. Have you checked your levels? Thought I saw this once with low coolant in the expansion tank. Quote Link to comment https://www.bigmacktrucks.com/topic/31899-lightning-bolt-comes-on-then-turns-off/#findComment-193826 Share on other sites More sharing options...
j_martell Posted July 14, 2013 Share Posted July 14, 2013 The lightning bolt signifies an electrical problem, ANY electrical problem....could be nothing, could be a big deal. Mine comes on if the thermometer craps out....pita. If it doesn't have the vmac system, maybe get it scanned, I am pretty sure they store error codes. Just one goofy reading will set it off, personally I would rather spend the money and keep rolling.... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/31899-lightning-bolt-comes-on-then-turns-off/#findComment-193948 Share on other sites More sharing options...
Bobby Covert Posted July 15, 2013 Share Posted July 15, 2013 I vote for the low coolant too! Quote Link to comment https://www.bigmacktrucks.com/topic/31899-lightning-bolt-comes-on-then-turns-off/#findComment-194339 Share on other sites More sharing options...
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