Help Troubleshooting DS-1 Keeley ASEM & Ultra mod

[Henry89789]

I  found the "formula" for this mod on instructables. The mod (which I am sure many of you are familiar with)  involves 11 cap changes; 3 resistor changes; the D4 and D5 changes; a 47 pf cap across the clipping diodes on the solder side of the pcb; and (the distinctive feature of the Keeley mod) the switch which allows you to select between a LED or a LED and diode in series and turns on the LED when one of the selections is made.

Well, the mod essentially works; each side of the switch gives distinctive high gain tones; as mentioned in the other thread just started regarding a DS-1 Keeley mod based on instructions from instructables, I am also finding a tremendous increase in volume when the pedal is on regardless of the switch selection. I took that to be part of the modded pedal's sound. The only problem I am having with the pedal is that the   cool LED connected to the mini-switch (that is added as part of the mod) that is supposed to come on when the Ultra mod (or is it the All Seeing Eye Mod) is selected does not come on when either selection is made.

Also I played the pedal before putting it all back together, and the LED which was put into D5 comes on while the guitar is being played (when you stop playing the LED goes out); and the LED is brighter on one of the switch selections than on the other one.

Anyone have any ideas why the LED connected to the switch is not coming on when everything else seems to work?

[petemoore]

  Anyone have any ideas why the LED connected to the switch is not coming on when everything else seems to work?     The input voltage must exceed the LED threshold voltage, perhaps the signal in isn't breaking over and switching the LED on. Try a boost in front to boost input/gain voltage into the LED ? The voltage must exceed the diode's threshold voltage before 'any current flows through the diode.
  Volume boost...an LED has relatively high threshold voltage [for a 9v distortion circuit], probably higher than what was the original clipping threshold. All signal above 'X voltage' [the clipping threshold voltage]...and LED and a diode should let most of the signal pass unclipped.