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Solved the flashing headlight issue, one of the headlight 3 stud bolts rubber isolator was loose resulting in a bad ground. Just replaced the alternator belts today. The alternator spools up fine, no noise, etc. After the truck warms up, the volt gauge will spike hard right into the red. I shut...

Well I'll revive the thread. My M936A1 wrecker will occasionally pop over into the RED on the volt meter and the LED headlights will flash on and off on low beam. It doesn't matter if the lever light switch is off or on. I can get the lights to stop flashing by putting them on high beam with the...