Light in one sections will not go on with the switches (2) at both ends of the hall, but all house on lights the hall but all off will not turn off the lights. also cutting power and turning it back on will change the state. that is if the lights are on cycling power will turn them off and visa versa.

To test the ignition system on a VW engines with this ignition system you check at the 3 pin plug on the distributor there is 12 volts on the 2 outer pins, this gives a feed to the hall sender in the distributor. The centre pin is the switch to the ignition amplifier that is built into the coil. If you disconnect the plug of the hall sender fit a piece of wire to the centre pin with the ignition switched on and flash it to earth you should get a should get a spark at the king lead. Reconnect the plug and use a LED test light to test switching by connecting one end of the test light to a positive feed and the other end to to the centre pin you should see the led flash when cranking.

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.

switch out the light with a known good blub
maybe the lights are bad

that is a 3 way switch. In order for that to work it has to be installed to a light with more than one switch. For example in a hall way and there is a switch at both ends of the hall then both switches need to be 3 way switches

At this point either. Once you hook up the switch test the switches on both sides. Make sure each one turns on and off if that makes sense. If the blue wires are on wrong one switch will only work if the other one is on. If that happens reverse the blue wires and that should fix it.

i don't know about 2way switches but a three way switch that will turn a light on at both ends of a hall or off is power to one switch ,three wire between switch switch leg from other switch , make up is tie neutrals together grounds together leaving a black and red from tree wire (travelers)and a black at the switch leg (power)

The white and the black wires are both hot wires, and the green wire is for earth ground only. The green wire does not belong hooked up to the white wire.

The two black field wires should be attached to one side of the dimmer switch (one of the black wires from the dimmer switch)

The white field wire should be attached to the other side of the dimmer switch (the other black wire from the dimmer switch)

The green wire from the dimmer switch should be hooked up to earth ground only (any un-insulated copper wire that is inside the switch/outlet housing) and if you can not find it attach the green wire to the inside of the light switch outlet housing and be sure that it is attached to metal.

The other hall light switch that you are talking about must be connected inline with that light switch you trying to turn into a dimmer, and it should operate again nomally once you have connected that light switch properly, and if not check for any tripped circuit breakers.

i had this problem about 6 months ago at a customers house .we ended up changing motor and hall sensor, could b same problem on your unit. get windings checked b4 you replace hall sensor. it might save u money. please reply 4 more help if needed.good luck

if you only intend to turn the security light of and on just use a single switch fed from the hot (not switched) side of one of the other switches if this is not what you are wanting email me a detailed description of what you are trying to do at [email protected] and i will help the best i can

there are too many ways to wire a 2 way switch circuit (3 way switch) to mess with, the two most common ways, will trip out the circuit if wired to each other, (one kind at each end, hope that makes sense), the most common mistake, will put 110v to the metal plate of the switch and switch box, not good
a sparky will take 5 minutes to determine which wiring pattern is used, and install the switch