My Pioneer DEH-P640 in dash AM/FM CD Player is what I am having a problem with. My display is working however it is very dim, you can only see the display at night when the interior of the vehicle is dark. Is there some sort of dimmer controller in the deck or some sort of a factory reset button...to reset deck to factory settings? I thank you in advance for any assistance...Walt Smith
Does the Vehicle It is in have auto headlights or are the headlights on when you notice this. If so try and Make sure the headlights are off and see if that makes a difference. Otherwise thers is I believe an orange wire in the harness that gets hooked up to the headlights for lighting on the deck at night driving
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Real Answer to set Clock on Pioneer DEH-6 AM/FM/CD car player - DEH-6 will have no FUNCTION button.
1-Press SOURCE ("SRC" - button left of "1") and hold until unit powers off.
2-Press AUDIO ("A" - button upper right) and hold until clock appears in display.
3-Press </> arrows to select hour/minute to set - numbers will blink.
4-Press up/down arrows to increase/decrease hour/minute.
5-Press "BAND" or press "AUDIO" ("A") until unit powers off.
6-To check: Press CLOCK to turn on new clock setting display.