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Thread: Trouble with pool light

  1. Back To Top    #1

    Join Date
    May 2014
    Houston, TX

    Trouble with pool light

    The pool light is not working but the spa light is working. Switches for both lights are right next to a GFCI. I am assuming that there is nothing wrong with the GFCI since the spa light is working.

    There is 120V at the pool light switch. I removed the switched and shorted the two leads to eliminate the switch factor (it looked corroded). I was expecting to get 120V between the center contact of the light socket and the threads of the socket. I got readings from 13V to 120V depending on where on the threads I touched with the meter probe. I left the light fixture under the sun to let potential moisture evaporate (even though everything seems completely dry). After a few hours the readings still vary between 12V and 120V.

    When I screw on a light bulb I see no action at all.

    Any clues on what's going on here? A loose contact between wires and light socket? Is it possible to dissasemble the light housing without compromising the water seal?

    Thanks for your help.
    13K Gal, underground, white plaster, sand filter, spa

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Trouble with pool light

    Welcome to TFP!!!

    Sorry you have not gotten a helpful response yet. I am not sure what is wrong, but does sound like a bad connection somewhere.

    I am pretty sure you can not disassemble the housing though.
    Jason, TFP Moderator
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  3. Back To Top    #3

    Join Date
    May 2011
    Los Angeles, CA

    Re: Trouble with pool light

    Welcome to TFP!

    Did you check the connections at the junction box? there should be a junction box near the pool, one for each light. Is the light socket corroded?

    How good are you with a multimeter and around electricity? Please be careful testing and taking voltage measurements around water. I would strongly suggest turning off the power before disassembling anything or removing covers from electrical boxes.
    Suley, West Hills, CA
    IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo VS 3HP, Pentair Clean & Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.

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