my headlighs go off and on while the car is sitting still what can cause that
on 1992 Mercury Grand Marquis

head lights go offo and on while I am sitting still

Asked by for the 1992 Mercury Grand Marquis
2 answers
if you mean while car is parked and your horn doesnt work
it may be you triggered the anti-theft
I do it ocassionally
maybe your switch is sticking