Where in the world is the dimmer switch on a 73 240Z? I can't find it anywhere. Also, if anyone has any idea, I have two pull knobs under the dash on both sides... any idea what those are??

Dimmer for the dash lights, should be on the underside of your dash just right or left of the steering column. (can't remember which side)

Headlight dimmer is a function of your turn signal switch, which is activated by pulling the lever towards you.

The pull knobs are your fresh air vents.

Dimmer for the dash lights, should be on the underside of your dash just right or left of the steering column. (can't remember which side)

Right side is the dash illumination dimmer, the left side resets the trip odometer.

My dash has the odom reset but there is no place for a dimmer switch! I kept looking there but couldn't find one! Am I missing something?

My dash has the odom reset but there is no place for a dimmer switch! I kept looking there but couldn't find one! Am I missing something?

Sounds like maybe.

See number 17 on this link:

http://classiczcars.com/forums/attachment.php?attachmentid=4942&d=1084548143

And look where the red arrow points on the attached picture.