How To Replace a Pool Light Fixture

WRITTEN BY:  Inyo Pools

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This guide shows you how to determine if you have a bad light fixture and, if so, how to replace the whole fixture including the wiring to the fixture.

Video

Step by Step

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Step 1

DETERMINE IF LIGHT FIXTURE IS BAD - If your light continually trips the GFI circuit, there's a good chance that it has developed a short in the light fixture or wiring. At this point you will have to replace the whole light fixture and wiring. If you have two lights tied together than you will have to wire each light independently to test which light is tripping the GFI.


Step 2

TURN OFF POWER - Before working on your light fixture, be sure to turn OFF power to your lights at the circuit breaker.

Step 3

DISCONNECT LIGHT WIRES - Locate the power junction box for your lights. It will normally be next to the house close to the pool control box. Open up the junction box and disconnect the wires to your light  You may have several light cables coming into this box. Generally they are labeled on the PVC pipes. If not, you may have to disconnect each independently and turn the power back on and off to see which cable powers each light. Mark the pipes for the future.

Step 4

ATTACH CORD TO POWER CABLE - Once you have determine which cable you want to pull out, attach a cord or special fish tape to the wire. One way to do this is to bend back the white and black wires to form a loop. Leave the green ground wire out straight. Then attach the cord though the loop. The green ground wire will parallel the cord as shown.


Step 5

TAPE CONNECTION - Tape the wire connection on both side of the joint so that no wire ends are left exposed. A smooth connection will move around any bends in the pipe more easily.

Step 6

UNSCREW LIGHT FIXTURE - Remove the light fixture off the pool wall. It is generally secure by one screw at the top of the light fixture.

Step 7

PULL FIXTURE OUT OF NICHE - Pull the pool light fixture out of the niche. You should have enough excess cable to be able to lay the light fixture on the pool deck. Note how the excess cable is stored in the niche so you can replace it the same way when you install the new pool light fixture.

Step 8

PULL LIGHT CABLE OUT OF WALL - Pull the light cord out of the pool wall. There is a conduit between the pool and the J-Box at the house. When you pull out the light cable at the pool, you will be pulling the cable out of the conduit and pulling through the cord that you attached to the other end


Step 9

FEED CORD AT THE J-BOX END - As you are pulling cable on the light fixture end, have someone else feed the other end of the wire and the attached cord down into the pipe.

Step 10

PULL_OUT_CABLE-CORD_CONNECTION - After you have pulled out all the old cable, you will expose the connection of the cord and cable created at the junction box.

Step 11

TIE CORD TO NEW POWER LINE AT POOL - Once you have pulled the old light cable out of the conduit, take off the cord that was pulled though with the old cable and secure it to the free end of the new light cable. - like in Steps 4 & 5.

Step 12

PULL NEW CABLE AT J-BOX - pull the new light cable back into the conduit by pulling on the cord at the terminal box end of the conduit. Have someone feed the cable into the conduit at the back of the pool niche so that it doesn't bind as you are pulling on the other end.

Step 13

LEAVE 4' SERVICE LOOP AT POOL NICHE - Pull the cable through the conduit until there is 4' of cable left at the pool side. This extra 4' will allow you to place the light fixture on the pool deck when you have to service the light in the future.

Step 14

PLACE NEW FIXTURE INTO NICHE - Position the new light fixture in the niche by first recoiling and storing the excess cable as observed in Step 7. Then push the light fixture back into the niche.

Step 15

REPLACE PILOT SCREW - Replaced the single screw to secure the pool light fixture to the niche


Step 16

REMOVE EXCESS CORD AT J-BOX - Go back to the J-Box end of the cable and cut off the extra length of cable, leaving about 7 extra inches.

Step 17

ATTACH WIRES TO J-BOX -Use wire strippers to strip 6" of the outer cable casing to expose interior wires. Strip about 1" of wire coating off each wire and attach the cable wires to appropriate wires in J-box.

Step 18

REPLACE J-BOX COVER - Replace the J-Box cover and secure it with the screws removed in Step 3.

Step 19

TURN POWER ON - Turn the power to the lights back on at the breaker box.

Step 20

CHECK LIGHT - Check the new light at the pool to see that it is operating properly.

Comments

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(1 to 10 of 10)

Inyopools  Posted: 10/11/2017 17:03 PM  Inyo Product Specialist

Anonymous (cable stuck) - Sometimes the cable is sealed around the hole in the back of the niche with epoxy. You may have to chip that out around the old cable.


Anonymous  Posted: 10/06/2017 15:21 PM 

Followed listed instructions but cable wont budge from either end. Is cable clamped in Hayward niche and if so how do I unclamp? Hoping to not drain pool.


Roy  Posted: 08/12/2017 13:28 PM 

Working on pulling the wire through the conduit. Very hard. Is there any type of cable lub that can be used that will not cause pool problems? Also, when I am done what should I seal the conduit hole with at the back of the light housing? I don't want to have a pool leak into the conduit.


Rj  Posted: 05/04/2017 4:29 AM 

One thing not discussed on this video is when you remove the light fixture there maybe some white epoxy or caulking to stop water from going into the conduit. You can use a chisel/flat head screw driver and a small ball peen hammer to chip it away. After pulling the new light fixture you'll want to make sure to replace the epoxy putty or caulking to help keep water from getting into the conduit when the pool is full. The epoxy will even dry under water if you've detected a leak in the niche or performed the work under water.


Anonymous  Posted: 04/08/2017 12:23 PM 

Is there any kind of putty or epoxy that needs to be removed or replaced where the cord goes into the conduit at the back of the niche?


Anonymous  Posted: 04/08/2017 12:18 PM 

Is there any kind of putty or epoxy that needs to be removed or replaced where the cord goes into the conduit at the back of the niche?


Inyopools  Posted: 08/31/2016 10:35 AM  Inyo Product Specialist

Jason - Water will leak into the conduit. It is not sealed. The cable should be waterproof - no breaks. All electrical connections are made within the sealed light fixture and up at the circuit breaker near the house.


Jason  Posted: 08/30/2016 16:30 PM 

How does the water not leak into the conduit when you pull the old cable out?


Savannah  Posted: 05/30/2015 15:27 PM 

My pool guy said it would cost me $1600 to replace the pool light and the spa light! Thank you for this easy step by step guide on how to replace them myself!... I will save myself $600 to do this job myself!!


rnlfrank  Posted: 06/11/2014 18:45 PM 

Took me about 1 hour to replace with a new fixture. By myself without
my electrician who wanted $125 for the job. I did spend $20. on a new fish tape from Lowes. Thanks for the great step by step instructions.