what causes a noise like the turn signal clicking but no lights are flashing on 2004 Oldsmobile Alero

A clicking like the turn signal clicking comes and goes at different frequencies but the lights don'e flash when this happens. The turn signals themselves work correctly. Any ideas?

1 answer 1 comment
poss an a/c door actuator under dash. does it stop after approx 1 min after starting
it doesn't necessarily start right away and it comes and goes.