Have swtich @ bottom of stairs @ top of stairs then two light fixtures in hall and another switch @ end of hall no switchs turn on lights?
First, if there are two switches controlling the lights they are called "three-way" switches(due to the number of combination switch positions). Second, it would only be a "four-way" switch if there are more than two switches controlling the lights. What you have is a system which contains two "three-way" switches and one "four-way" switch, for a total of three switches. The location of the switches can be in any physical location, but the current path will always be the same; power into one of the 3 way switches(common) switched (either/or) from that 3 way thru the 4 way(also either/or) to the other 3 way(either/or)then from the common to the load(light). In a configuration like the one you described, it most times is the wires connected to the 4 way switch are on the wrong screws. The wires coming from one switch usually connect to 2 screw that are the same color on the 4 way switch. Check the drawing that came with the switch. Also check the wires connected to the 3 way switches. It could be any one of the switches or a bad connection at the first light.
Pull the covers off the switch boxes and remove the switches but don't disconnect them. Look to see how many wires are connected to each switch. A two way switch should have 3 insulated wires connect to each switch AND a bare copper wire for ground. If you don't have that configuration, then it was not built correctly.
Testimonial: "Didn't answer my ?. should I be zeroing in on the switch @ top of stairs. would that be a 4 way switch?"
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