Q: Why do my interior lights flash on and off occasionally when driving? on 1992 Buick Roadmaster

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
When driving 40 miles at night it happened 8-10 times yesterday.
(1) Answer
Get your alternator tested it is probably starting to go bad and not cranking out enough power anymore to power the entire vechicle and accessories.