NDDan
Guest
WOW that's a weird one. When was the last time it did thisIJ Check harness closely from module to area under counsel. If hourmeter is related to ground speed I'd suspect currant getting into wire going to ground speed pickup. Maybe this would fry module. I'd be tempted to run new separate wire from module to ground speed sender if you don't find damage in harness. Tee'ing in a voltmeter accross positive and negative at module may pickup some sort voltage problem. Best of luck