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?

by in Reading, PA on March 15, 2013
1 answer 1 comment
ANSWER by on March 15, 2013
poss an a/c door actuator under dash. does it stop after approx 1 min after starting
COMMENT by on March 15, 2013
it doesn't necessarily start right away and it comes and goes.