I'm trying to help a 1968 owner diagnose the failure of the hazard warning lights. I looked at the 1966 wiring diagram and it doesn't appear to show the hazards switch/system. Does anyone have advice on diagnosing the problem?
This 1968 has the original M-code option for hazard emergency lights system. When the dash switch is pulled, it lights up but doesn't blink, and the four-way flashers do not blink either. Turn signals all work, so I know it's not the bulbs.