Question about Intermatic & Indoor/Outdoor Rain Tight Timer

1 Answer

Lights won't go on

We have two outside driveway lights that are set by Intermatic timer. The lights no longer go on after years of being fine. I replaced both bulbs. I manually turned the timer to the on position. I cannot seem to get the lights to go on. Any ideas?

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  • dmilstone Jun 04, 2010

    Thanks - but the timer itself is working as evidenced by the noise it makes (the dial moves according the time) but even if I move the on/off switch on the timer manually to "on," it still does not activate the lights.

    I've tried all of your other ideas and none seem to rectify the issue thus far.

    Thanks

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  • Master
  • 565 Answers

Sounds like the timer may not be getting power.

Turn the circuit breaker that supplies the circuit OFF then ON, as sometimes it's hard to tell if a breaker has tripped by looking at it.

It's possible that the circuit is controlled by a switch that someone may have inadvertently turned OFF.

Also, it's very likely that the circuit is fed from a GFCI receptacle (the kind with the test and reset buttons that are usually found in kitchens and bathrooms) that may have tripped. Those receptacles can sometimes be found in very obscure places. Check outside receptacles too.

If anyone has been digging in the yard or flower beds it's possible that the cable may have been damaged.

Posted on Jun 02, 2010

  • Bob
    Bob Jun 04, 2010

    The first step is to determine if you have 120 volts at the timer. You can use a volt tester or a light socket to test the circuit. If you have an Intermatic T101 you should get 120 volts between the "A" terminal and the #1 terminal.



    If you have 120 volts at the timer, turn the manual lever to ON and test for 120 volts at the lights. It's also possible that there is a bad connection at the light box. If you don't have 120 volts at the lights, then either the cable to the lights is damaged or the timer has a mechanical failure and needs replaced.

  • Bob
    Bob Jun 05, 2010

    If you have an Intermatic T101 you should get 120 volts from the "A" terminal to the #1 terminal. With 120 volts available, when the manual lever is in the ON position, you should get 120 volts from the "A" terminal to the #2 terminal. If not the timer needs replaced.

    Alternatively, turn the circuit breaker supplying the timer OFF, then temporarily remove the wire that is connected to the #1 terminal and put it under the #2 terminal (which also has the wire going to the lights.) Turn the circuit breaker back ON and, if the circuit to the lights is OK, the lights will come ON.

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