Want instructions to change time on a Pioneer DEH-1400 car stereo?

Answer 1

With the key on, press and hold the "source" button until the unit turns off.

Press and hold the Audio button until the clock display comes up with the hours blinking.

Use the left and right buttons to select hours or minutes. Use the up and down buttons to change the setting.

When you're done, press Source again.

Download an owner's manual here:
http://www.pioneerelectronics.com/pna/v3/pg/support/details/0,,2076_310070337_37850,00.html