Question about Lutron ELECTRONICS CO. Q-603PH-WH "QUOTO" 3 WAY DIMMER

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I have installed the master and slave and i cannot get either switch to work

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  • ffornari Sep 07, 2009

    ive installed lutron dimmers in 2 locations for the same light and cant get them to work



2 Answers

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  1. The first thing you will have to realize is that you can only replace ONE of the existing three-way switches with a three-way dimmer switch. If you try and replace them both, the circuit will not work. Therefore, choose to replace the three-way switch that you will probably use the most to control the lighting.
  2. Step 2 Find the circuit breaker that is delivering the power to the lighting circuit and toggle it OFF. Flip each three-way switch to make sure the circuit is off.
  3. Step 3 Remove the cover plate from the switch and remove the two screws securing the switch to the wall box.
  4. Step 4 Gently pull the switch out of the box by pulling on the top and bottom tabs. Do not touch the sides of the switch. With the switch out of the box, use your voltage tester to ensure that the circuit is truly off.
  5. Step 5 Take a moment and look at how the switch is wired. One side of the switch should have a single red wire attached to it and the other side should have either two black wires and the ground or a black wire, a white wire with a strip of black electrical tape on it and the ground wire.
  6. Step 6 Remove the red wire and bend it out of the way. Remove the two black wires (or the black and taped white wires) and bend them out of the way. Bend the top wire upwards of the box and the bottom wire toward the bottom of the box so you will know where they get connected on the dimmer switch. Lastly, remove the ground wire and toss out the old three-way switch.
  7. Step 7 Check all of the wires to make sure that they are all in good condition. If any look corroded or weak, just cut off the existing exposed wire and use the wire strippers to remove about 3/4 inches of insulation so you have fresh wire to work with.
  8. Step 8 Connect the ground wire to the three-way dimmer switch first. Then, connect the red wire to the side of the switch with the solitary screw. Now, connect the other two wires to the other side, keeping in mind which one goes on top and which one gets connected to the bottom.
  9. Step 9 Wrap a tight layer of electrical tape around the three-way dimmer switch to protect the terminals. Gently push the wires back into the box and secure the dimmer with the two screws that came with it. Lastly, replace the cover plate with one that properly fits the dimmer molding.
  10. Step 10 Toggle the circuit breaker back on and try out your new three-way dimmer switch!
Thanks for using FixYa!

Posted on Sep 07, 2009

  • 2 more comments 
  • blueextc3221
    blueextc3221 Sep 07, 2009

    Lutron has a line that DOES offer Master and Clave controlling possibilities.

    This is called a California set-up.

    More to come....

  • blueextc3221
    blueextc3221 Sep 07, 2009

    please indicate the model # of the switch you are using.

    Is it the maestro?

    And is it a Dimmer SWITCH, or just a Dimmer?

    Model # would be very helpful.


    please reply using the "continue with this expert" option.

  • blueextc3221
    blueextc3221 Sep 07, 2009

    CLICK HERE for all the MAESTRO wiring diagrams (depending on your model #)

    CLICK HERE for all the MAESTRO installation guides (depending on your model #)

    Let me know if you need further help.

  • blueextc3221
    blueextc3221 Sep 07, 2009

    The very first guid on THIS PAGE is the one you want.

    Follow the instructions for 5b (2 location control wiring).

    Wiring the Dimmer:

    • Connect the green ground wire on the Dimmer to

    the bare copper or green ground wire in the wallbox.

    • Connect the tagged wire removed from the switch

    to the black screw terminal on the Dimmer.

    • Connect one of the remaining wires removed from

    the switch to the brass screw terminal on the


    • Connect the remaining wire removed from the

    switch (note wire color) to the blue screw terminal

    on the Dimmer.

    Wiring the Accessory Dimmer (MA-R, MSC-AD):

    • Connect the green ground wire on the Accessory

    Dimmer to the bare copper or green ground wire

    in the wallbox.

    • Connect the tagged wire removed from the switch

    to the black screw terminal on the Accessory


    • Connect the same color wire connected to the blue

    screw terminal on the Dimmer (wire color noted

    above) to the blue screw terminal on the Accessory


    • Connect the remaining wire removed from the

    switch to the brass screw terminal on the

    Accessory Dimmer.

    Schematics are on the page.

    If you are STILL not getting the light to work - check the bulb :)

    Also be sure all of your wires are stripped back far enough, and your wire nuts are tight.

    Thanks for using FixYa!!


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Hi ffornari,

please make sure :
- the button cell powering the CMOS data is still in shape
- you have activated both of the IDE channels
in the BIOS and set the drive detection to auto, then ensure the power
plug is inserted correctly and the power supply has enough power (above 250 W) to support all of the drives (including the CD or DVD drive, this can easily amount up to four drives! plus the extra supply for the graphic card fan.., some AGP cards need extra power to run).
try several reboots, as it may take a while for the hardware to detect the drives
- if this still does not work, use a CD or DVD drive as master device
(see jumper settings in the back of it) and hook up the slave disk to it,
set detection to auto again, save settings , reboot.Then hook up second drive as single to the 2nd IDE channel.

You may be lucky now!

Good luck to you

Posted on Sep 07, 2009


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