Need help with fresh air fan relay, Pin 86 is hot when car is off Options

[gord]

I'm trying to diagnose some electrical gremlins in my car. This is complicated by the fact that a previous owner somehow wired the fuse panel incorrectly, so I've been tracing wires trying to sort things out. I've been making progress, and have at least got things to a point where I don't blow a fuse as soon as the wipers or fresh air fan are turned on — but the problem now is that I can run the fan and wipers with the car turned off.

I am presuming that this is not normal, but please correct me if I'm wrong.

Car is a 1972. From the wiring diagram, I can see that pin 86 on the fresh air fan relay should be powered from the "X" position of the "steering column switch" (the ignition switch?), via the 15 post in the headlight switch (which I believe means it should only be powered when the ignition is turned on)... so I'm guessing this means removing and rewiring the ignition switch?

Looking for any tips or advice, or if anyone has suggestions about what else I should be looking at.