JBLogging3 Posted March 2, 2015 Share Posted March 2, 2015 Anyone ever had a problem like this. Or something close to it we think it might be the dash cluster. when we run the PTO and turn the rpms up as soon as you turn the headlights on the RPM shuts down. We started with the wires in the back of the truckmake sure everything had a good connection and was wired correctly. running lights turn on but turn signal and brake lights only work with the lights off shut off. Quote Link to comment https://www.bigmacktrucks.com/topic/39119-05-granite-light-problemsmostly-right-turn-signal/ Share on other sites More sharing options...
turckster Posted March 3, 2015 Share Posted March 3, 2015 With the hand throttle on and it kicks out when the lights are turned on makes me think one or both tail lamp bulbs may be bad. Could be back feeding voltage making the vecu think that the brake is applied. Quote Link to comment https://www.bigmacktrucks.com/topic/39119-05-granite-light-problemsmostly-right-turn-signal/#findComment-281320 Share on other sites More sharing options...
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