Fog LIght mod revisited

[onlyphases]

Has anyone tried the fog light mod that requires building an electronic toggle switch and was successful in making it work. I built the circuit and installed but nothing happened. When I disconnected the common ground to the circuit, I the relay disengaged. If i hooked it back up, the relay would engage again, w/o the fog lights coming on. The fog lights would not come either way. However, when I took the circuit off the car, the fog lights would work again. Can anyone help me determine what might be wrong with the circuit, or how I could test it. I am fairly confident that the circuit was built correctly. I went over it several times.

Can anyone help?

[Fishboy55]

PM DjScript. It's his design. Sounds like you may have had it hooked to the wrong wire from the foglights, but just PM DJ.

[onlyphases]

thanks for d info fish

[mighty]

it sounds like grounding out

[onlyphases]

I was thinking about that. I am glad you responded.
i had it on a common grond from the circuit board to an external battery (which was grounded) off the car to see if it would work. When I get home, I will try it on the battery in the car.
I will also have to test the circuit to verify voltage and current flow (must be careful)
All suggestions are welcomed.

Thanks.