Yes, I grounded it. No positive voltage applied. The clock is keeping time. I can push display and it lights up for a few seconds, and there are no other functions. To be accurate I have the GRAY and ORANGE to 12V+ adn the BLACK/WHITE to GROUND and the backlighting is lit up constantly. I push the RECALL function and it displays time.
This is the wiring diagram for that year. I don't have a PINK wire. I have BROWN and
2001 Pontiac Grand Am Stereo Wiring Information
Radio Battery Constant 12v+ Wire: Orange
Radio Ground Wire: Black/White
Radio Illumination Wire: Gray
Stereo Dimmer Wire: Brown
Stereo Amp Trigger Wire: Pink
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue
[This message has been edited by mental floss (edited 12-13-2014).]