bem1414 Posted February 3, 2017 Share Posted February 3, 2017 (edited) I have a 06 granite it started out with the lighting bolt coming on every time I started pulling a hill for a second or to only when loaded code was 3-6 next day all the gauges stopped working shut truck off two times nothing sat for 20 mins turned key on worked fine next day gauges worked fine lighting bolt flashed couple time but at one point looked at mileage that was on but the hours were blank any suggestions thanks Edited February 3, 2017 by bem1414 Quote Link to comment https://www.bigmacktrucks.com/topic/48599-granite-electrical-problems/ Share on other sites More sharing options...
Mackpro Posted February 3, 2017 Share Posted February 3, 2017 Hours are stored in the engine ECM, Miles are stored in the VECU ( vechicle ECM in cab) . You are loosing power or J1939 communication to the engine ECM. Quote Link to comment https://www.bigmacktrucks.com/topic/48599-granite-electrical-problems/#findComment-360630 Share on other sites More sharing options...
220cummins Posted February 4, 2017 Share Posted February 4, 2017 Check dash grounds on drivers side and passenger side dash. They are inside the dash. I had a similar complaint on one 9-2 was present. Followed a service bulletin for that code and found cab ground on passenger side dash was loose. Quote Link to comment https://www.bigmacktrucks.com/topic/48599-granite-electrical-problems/#findComment-360685 Share on other sites More sharing options...
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