Can anyone tell me what decoder/speaker can I use. It is a great running loco but it needs to have sound.Help!

I have 3 nickle silver #5 turnouts, one will not power the locomotive through the turnout and it shorts the ice cab throttle.
Can any one tell me what is wrong & how to correct it?

Let me clarify my issue; I know the frogs are not powered, but my issue is that I can not get continuity on the track after the frog so the locomotive will continue to run.  I have the jumper connected, I have tried it both ways, still no power in the track after the frog.

Would it be possible to connect the smoke generating unit to the headlight circuit, thereby being able to shut the smoke  unit off with the F10 button as needed. Thus applying more voltage to create smoke at any speed.
When operating at low speeds there is no smoke. This Locomotive is used to pull a consist of Denver & Rio Grande Western scenic cars.