switched 12V problem

[PaulD]

ok, now I have a really tough problem. It seems that most of the switched 12V from the underdash fuse box is gone. Where the heck does it comes from, what generates it ?

P.S. All of the connections seem to tight and all of the fuses are good, including under the hood

[Christ]

Ignition key "on" circuit. Check it in a wiring diagram for your vehicle, preferably not a Chilton's manual.

[PaulD]

I think the actual "switch" is the key switch itself, I can't see or think of anything else that would do that. I will replace it and see what happens - should fix it though.

[Christ]

Yep, but it could be in the wiring in the circuit, not just the switch itself. Replace the switch though, its' cheap. If that doesn't do it, start tracing wires.