2 circuits, 1 box, 1 circuit won't work unless I remove indicator led

[dr.benway]

I have two independent circuits (separate inputs and outputs) in one enclosure. They're wired in parallel sharing the same power supply.
Each effect has a spst toggle with a led to indicate on/off.
There's a 4k7 resistor in series between the leds + and the power supply.
The problem is that only one led lights and only one effect powers up. If I remove the second led the second effect powers up normally.

Any idea where the problem is coming from?

I initially had a 4k7 resistor between each led and the power supply but that didn't work either.

[GibsonGM]

Can't really see what you've got going on, Benway, but here's what I think.  If your LEDs are in SERIES with the power supply, they're going to act like switches of a sort.  Are they in parallel, across the power supply (to ground) and switched??  Are they supposed to be true bypass, and run in parallel?  A drawing would help to see what's up.

~Mike

[dr.benway]

here's a quick pic hope it's ok.

The leds feed into the 9v+ in of each circuit.
Could it be a grounding problem ?
I'm learning on the fly so my answers might not be helpful.

[jacobyjd]

yeah...you're going to want to use that switch to go between +9v and GND, not +9v on your circuit. The LEDs (and the resistors) are limiting your power. This is why we use 3pdts to bypass effects--2 poles for true bypass, and 1 pole to connect the LED to GND from +9v. You then run separate lines directly from the +9v input to your boards.

[dr.benway]

ok so I go between 9v and ground but can I run a wire from the 9v lug on the switch to the circuit ?
or do I have to use 3pdt switches if I want the leds ?

[jacobyjd]

That's not good practice for several reasons--

1. essentially, you're cutting power every time you hit the switch. You want power to be constant.
2. You're still using a pole of the switch, so you're not going to have true bypass (which is ok, as long as you have a good buffered bypass setup, but that doesn't appear to be the case).

So--your solutions are as follows:
1. Get a 3pdt switch and call it a day
2. Build a milennium bypass on a daughter board (uses a few extra components to still true-bypass the effect, but also switch the LED with a DPDT switch)

Make sense?

[dr.benway]

ok thanks for the advice.
Ordering the 3pdt.

[boogietube]

This may help...

http://www.generalguitargadgets.com/pdf/two_in_one_wiring.pdf