what makes the lights flicker on a 1985 ford bronco when running ?
Which lights, headlights, interior, all? Possibly a loose wiring/ground connection, or alternator can be the culprit.
And not when engine off? A bad diode in the alternator will cause an AC voltage at the battery. if you have a digital volt meter with the AC volts setting you can test for AC at the battery
Search Ford Bronco Questions
Ford Bronco Experts