DAVID MACK Posted December 25, 2010 Share Posted December 25, 2010 have a mack vision getting the lightning bolt light and then truck shutting off. now truck will start but not keep idlewas told could be a bad circut breaker? its not the coolant sensor thanks for your help Quote Link to comment https://www.bigmacktrucks.com/topic/17008-lightning-bolt-light/ Share on other sites More sharing options...
RowdyRebel Posted December 25, 2010 Share Posted December 25, 2010 have a mack vision getting the lightning bolt light and then truck shutting off. now truck will start but not keep idlewas told could be a bad circut breaker? its not the coolant sensor thanks for your helpIf the lightning bolt light is on, you can turn off the cruise control and press and hold the set/decel button to get the code. The lightning bolt will flash, pause, then flash some more. Count the number of flashes.For example, one I see from time to time is "blink blink blink blink (pause) blink" would be a 4-1 code...which on my '01 CH is for the Vehicle Speed Sensor. Another is "blink (pause) blink blink blink"....or the 1-3 code for the fuel temp sensor.There may be more than one code...and once it has run through all of the codes causing the light to be on, they'll repeat. Not sure if it's necessary or not, but I usually keep holding the set/decel until I've seen 'em all and they start repeating.If the codes don't tell 'em what's wrong, it'll at least give 'em a jumping off point for where to start looking. Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/17008-lightning-bolt-light/#findComment-69219 Share on other sites More sharing options...
DAVID MACK Posted December 26, 2010 Author Share Posted December 26, 2010 If the lightning bolt light is on, you can turn off the cruise control and press and hold the set/decel button to get the code. The lightning bolt will flash, pause, then flash some more. Count the number of flashes.For example, one I see from time to time is "blink blink blink blink (pause) blink" would be a 4-1 code...which on my '01 CH is for the Vehicle Speed Sensor. Another is "blink (pause) blink blink blink"....or the 1-3 code for the fuel temp sensor.There may be more than one code...and once it has run through all of the codes causing the light to be on, they'll repeat. Not sure if it's necessary or not, but I usually keep holding the set/decel until I've seen 'em all and they start repeating.If the codes don't tell 'em what's wrong, it'll at least give 'em a jumping off point for where to start looking. thanks i will check it out Quote Link to comment https://www.bigmacktrucks.com/topic/17008-lightning-bolt-light/#findComment-69242 Share on other sites More sharing options...
John Kerry Posted April 27, 2022 Share Posted April 27, 2022 (edited) I had the same problem in 2014 very old post i think. I get cash for scrap in Melbourne Edited June 14, 2022 by John Kerry Quote Link to comment https://www.bigmacktrucks.com/topic/17008-lightning-bolt-light/#findComment-496215 Share on other sites More sharing options...
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