Why is building entrance light not working?

1) If you are replacing T103, the T103 can be wired many different ways. Not all wiring diagrams are supported by GE 15600 replacement timer that fits into Intermatic box.

2) Double check your T103 terminals
T103 terminals should be A 1 2 3 4
If terminals 3 and 4 have wires, then GE is not correct replacement.
You can buy repair parts for Intermatic timer
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

3) GE has terminals 1 and L which are connected by brass bridge. If brass bridge is removed, add a jumper wire and connect terminals 1 and L
GE has terminals 1-L X 2

4) Typical GE 15600 wiring shows on following link, in addition to links for parts and manual:
http://waterheatertimer.org/GE-timers-and-manuals.html#15306

White wires on terminal A connect to terminal X
Black wire on terminal 1 connects to terminal 1
Black wire on terminal 2 connects to terminal 2

1) If you are replacing T103, the T103 can be wired many different ways. Not all wiring diagrams are supported by GE 15600 replacement timer that fits into Intermatic box.

2) Double check your T103 terminals
T103 terminals should be A 1 2 3 4
If terminals 3 and 4 have wires, then GE is not correct replacement.
You can buy repair parts for Intermatic timer
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

3) GE has terminals 1 and L which are connected by brass bridge. If brass bridge is removed, add a jumper wire and connect terminals 1 and L
GE has terminals 1-L X 2

4) Typical GE 15600 wiring shows on following link, in addition to links for parts and manual:
http://waterheatertimer.org/GE-timers-and-manuals.html#15306

White wires on terminal A connect to terminal X
Black wire on terminal 1 connects to terminal 1
Black wire on terminal 2 connects to terminal 2

5) Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

T103M is 120Volt timer that can handle all the Christmas lights.
Minimum on-off time 1 hour.
Rotate dial until current time lines up with silver pointer.
Set on-off trippers on dial.
Let's go step by step.

1) T103 has terminals A 1 2 3 4 >> terminals are also called poles
DPST (double pole single throw) and SPST (single pole single throw) are two different ways to wire this particular timer.
T103 timer can be wired numerous ways... but your project is not complicated.
DPST means timer turns off two terminals/poles (double pole) with each click/throw of timer switch (single throw)
SPST means timer turns off one terminal/pole (single pole) with each click/throw of timer switch (single throw)

2) T103 timer is ST single throw, all the lights come on at same time. So this timer is 1 channel.
1 channel timers are either ON or OFF and everything turns on-off at same time.
You cannot stagger on-off times with 1 channel timer.
If you want upstairs and downstairs lights to come ON at different times, you need two timers .. or a 2-channel timer (which is different ballgame).

3) T103 timer has 120Volt clock motor that is connected to terminals A and 1.
Look at timer and you can see small white wires connected to A and 1 terminals that power 125V clock motor.
When wiring this timer, your wires from 20 amp breaker box connect to terminals A and 1.
Black hot wire from breaker must connect to terminal 1
White neutral wire from neutral busbar must connect to terminal A
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
http://waterheatertimer.org/B220C.html

4) Terminal 1 must be hot so when timer switch clicks ON, it sends power to terminal 2.
Your load wires connect to terminals A and 2
I made simple drawing of SPST option showing how to wire T103 to 3 receptacles.
Fixya downgrades image so it's hard to see.
Hot wire to terminal 1
Load wire to terminal 2
Neutrals on terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-21Kb.jpg


If you want to wire timer for DPST, which is necessary for loads exceeding 2 horsepower (1500 Watts) on each terminal
Notice black jumper wire from terminal 1 to terminal 3
Notice all white neutral wires to terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-17Kb.jpg

I made third image for guy who was wiring high amperage blowers, that show wiring for two T103 timers. Having two timers would let upstairs and downstairs lights come on at different times.
http://waterheatertimer.org/images/110-with-2-timers.jpg

T103 has 120volt clock motor.
If your circuit is 240volt, then change T103 for T104.
Electricians test before hooking up wires.
Use ordinary tester.
Separate wires and turn on power.
Test each wire to bare ground wire.
Tester will light up on hot wire.
In absence of bare ground, test each wire against other wires or against grounded surface to isolate the hot wire.
Hot wire connects to terminal 1 on T103 timer.
Now test hot wire to other wires (exclude bare ground)
Tester lights up on Neutral wire.
Neutral wire connects to terminal A.
The last wire must go to Load, so connect this wire to terminal 2.
Bare ground wire connects to green ground screw.
Turn on power, click manual override to check if load turns on and off.
Lift and rotate yellow dial until current time lines up with silver pointer.
Put trippers on outer edge of dial at on-off times.
Off tripper are brass colored.
Each tripper is marked.
Minimum 1 hour on-off period.

T103 Intermatic timer has 120Volt clock motor and can control 120V or 240V Loads.
Wiring for timer is shown on following link:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Troubleshoot T103:
1) Manual override is working correctly, and it snaps crisp and clean, and Load turns on-and-off.
That means timer is basically good.

2) Next look to see if yellow dial is rotating.
If dial is not rotating, then 120Volt clock motor needs to be replaced.
Take photo of wiring and mark wires before starting.
Remove two white wires connected to screw terminals 1 and A.
Snap timer mechanism out of box, clock motor is on back of timer.
Use small star screwdriver to remove old clock motor.
Reattach white wires on terminals 1 and A, tighten screws very tight.
Reset current time: lift and rotate dial until current time lines up with silver pointer.
Grainger sells 125V clock motor:
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK1?Pid=search

3) If dial is rotating, but gets stuck at certain times, or runs slow, then replace clock motor.

4) If dial is rotating, and trippers are attached to dial, but timer does not turn ON, then trippers are worn down and need to be replaced.
Grainger sells the T103 trippers
http://www.grainger.com/Grainger/INTERMATIC-Timer-Tripper-2E054?Pid=search

5) How Intermatic mechanical timers work:
Dial with ON-OFF trippers is rotated by clock motor.
Trippers on dial contact ON-OFF lever.
ON tripper pushes lever one direction.
OFF tripper pushes lever opposite direction.
Lever moves electrical contacts on back of timer that turn Load ON-OFF.
Manual override lever clicks back and forth with each ON-OFF action.

You posted under T103 Intermatic timer
Add a comment if you have different brand.
Current time lines up with silver pointer.
Sounds like silver pointer is not at 6:00 position


Review timer operation:
T-103 timer dial rotates around until tripper contacts mechanical lever:
On tripper pushes lever one direction until it clicks, OFF tripper pushes lever other direction.
Each time lever clicks into position, manual-override lever also moves back and forth.
Manual override is connected to same lever that trippers push.



Troubleshoot:
Watch if timer functions as described above.
Click manual override and check that lights turn on-off correctly.
Add a comment if timer is doing something other than described.

Sounds like you have Line and Load wires reversed.
Line wires come from breaker to timer.
Load wires leave timer and go to Load (light, fan, motor, pump)
Open following link to view wiring for T103
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

1) If wheel is not turning, then replace motor
http://www.aplussupply.com/intermatic/timermotors.htm
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Wh40&op=search&Ntt=Wh40&N=0&sst=subset
There are numbers printed on clock motor. Also look inside door to see model number of timer. If you have a T101 or T103, T104 the T100 motor will work.

2) If manual override is not working, then replace whole timer.

3) You can buy same timer, and then swap insides without replacing box. For example if you have T101R, the R stands for rain-tight box. Buy T101 and swap insides. Keep in mind T103 and T104 and T101 are not interchangeable due to wiring differences.
http:waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

You can replace the clock motor for $16 ...
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Wh40&op=search&Ntt=Wh40&N=0&sst=subset
... but if the mechanical timer mechanism is worn out, then that is not repairable. To check mechanism, lift timer dial and rotate tripper pins out of way, then click manual override on-and-off >> if override works fine, and lights come on then motor is probably the problem.

If you buy a new T103, the insides might snap right into old timer box without needing to replace the box. To remove insides, depress retainer spring located at top, tip out timer, and lift to remove. New timer has 4 tripper pins. Save old tripper pins, and tape them inside box.