If I understand correctly, you have an Intermatic timer.
The timer has a yellow dial that rotates around like a clock.
Does the manual override work?If yes.
a) then the circuit has electricity
b) the lights are in working order
Does the clock rotate?If yes
a) then the timer is probably good
b) the clock motor could be bad
c) the gears could be rusty and dirty
Do you have the current time set correctly?Lift and rotate dial until current time lines up with silver pointer.
Do you have the trippers set on the correct time?There are ON trippers and OFF trippers
Attach trippers to correct time
Tripper pins wear out
Suggestion: You sit in front of the timer and watch the trippers as they rotate to the bottom of the dial
When the trippers get to the bottom, they push a lever that turns lights on and off.
Look at the photo:
Here's a website that sells tripper pins and clock motors for Intermatic timers.
You can buy new trippers or clock motor
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hiAnswer this post if you still can't figure out the problem, or need more help.
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