NHTSA recall 86V056000
Exterior lighting › Headlights › Switch
Buick Estate and 18 more
The defect
The push-pull headlight switch may have electrical contacts which allow an intermittent headlight circuit causing headlight to flicker or suddenly go out. consequence of defect: sudden loss of the headlights under severe weather or nighttime driving conditions could reduce driver visibility which might result in a vehicle crash without prior warning. note: also, see nhtsa campaign number 86v131000.
The remedy
Replace headlight switch as necessary.