Clean 12v switched source that is hot cranking and running

67Dart273 said
THERE IS NO SWITCHED SPOT ON THE FUSE BOX!!!!!

I have attempted to explain this dammit. There are only so many OUTPUTS from the ignition switch.

ALL of the switched power in the fuse panel COMES FROM ACCESSORY. This means If you tap power out of the fuse panel, the car WOULD RUN with the key in either "run" or in "accessory."

READ THIS!!!

THERE IS ONLY ONE SWITCHED SOURCE PERIOD!! IT COMES FROM THE IGNITION SWITCH and is known commonly as "ignition run" AKA IGN1
Click to expand...

My ‘74 has a circuit in the fuse box that powers the instrument panel, fuse #6. It comes off the blue IGN1 wire and is only powered in run. It’s the only one that does that though.

Did the earlier cars not go through the fuse box to power the IP?