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Steve4656, that "black box" is the new for model year (MY) 1975 "headlamps on" warning buzzer. Its function is to warn you that the headlamps have been left on when the ignition key has been turned off.
Look closely at your buzzer. I see a "58", which is the remainder of the patent number "3,768,158" printed on the buzzer. The part number 344835 printed on the buzzer agrees with the 1975 SERVICE part numbers
Red arrow/tan wire = plugs into your "IGN" cavity in your fuse block
Purple arrow/tan wire = connects to the defogger switch
Lime green arrow/gray wire = connects to map light mirror
Pink arrow/spade terminal = a red wire is supposed to be there. It is plugged into the "LPS" cavity on the fuse block
Blue arrow = spade terminal that is part of the buzzer assembly. Key/ignition buzzers don't have this. It is for additional accessories. AIM says A-31 power windows but that is not how my car is (original owner)
1975 AIM
Spade terminal in buzzer assembly. The black square button protruding through the metal case does nothing.
I hope this helps.
Last edited by '73and'75; Mar 3, 2023 at 06:38 PM.
