20 Most Recent Pioneer DEH-2100 CD Player Questions & Answers

Adjusting initial settings
1 Press SRC/OFF and hold until the unit
turns off.
2 Press MULTI-CONTROL and hold until
CLOCK SET appears in the display.
3 Turn MULTI-CONTROL to select one of
the initial settings.
CLOCK SET (clock)—AUX (auxiliary input)
# To return to the previous display, press
DISP/BACK/SCRL.
# To return to the main menu, press and hold
DISP/BACK/SCRL.
# To cancel initial settings, press BAND/ESC.
Setting the clock
Use these instructions to set the clock.
1 Use MULTI-CONTROL to select
CLOCK SET in the initial setting menu.
Refer to Adjusting initial settings on this page.
2 Press MULTI-CONTROL to display the
setting mode.
3 Press MULTI-CONTROL to select the segment
of the clock display you wish to set.
Each time you press MULTI-CONTROL, one
segment of the clock display is selected.
Hour—Minute
As you select segments of the clock display,
the selected segment blinks.
4 Turn MULTI-CONTROL to put a clock
right.

He may have to get underneath the dashboard and see if their is a security strap or wire harness holding the radio into the mounting sleeve. It's common for installers to strap down the stereo to prevent thefts and other installer from easily taking the radio out. Have him keep trying.

try putting the radio in standby mode first.

You'll find the wiring diagram on page 20 of the manual.

Wiring information is as follows:Yellow = +12V ConstantRed = +12V AccessoryBlack = Ground (Chassis)Blue/white stripe = Remote amp turn-on/Power antennaWhite = Left Front +White/black stripe = Left Front -Gray = Right Front +Gray/black stripe = Right Front -Green = Left Rear +green/black stripe = Left Rear -Violet = Right Rear +Violet/black stripe = Right Rear -Here is a link to a website that has a PDF document for the Pioneer Owner's Manual:http://www.manualowl.com/m/Pioneer/DEH-2100IB/Manual/56355In this, you should find the information you are looking for. I hope this was helpful.

You may have a bad volume down switch. If so, it needs to be replaced.

When a head unit doesn't remember settings like yours, then the Yellow constant battery wire isn't hooked up correctly. This wire provides power to your unit constantly from the battery so that it can remember the settings and such. Your aerial not going up is the Blue power antenna wire. This wire will provide power so that when you turn your unit on, it powers the antenna to go up. Hope this helps!

Red - Power - Connect to Acc on ignition or battery positive. Connected to Battery the unit will not power down when the ignition is switched off
Yellow - Memory back-up. Connect to battery positive
Black - Connect to vehicle earth or battery negative
Blue/white - Used to power up remote power amplifier or power antenna. Do not draw more than 300mA at 12V from this line
White + White/black - Front left channel
Grey + Grey/Black - Front right channel
Green + Green/black - Rear left channel
Violet + Violet/Black - Rear right channel
Use the wire with the black line in it for negative on any channel.
Do not earth any speaker wires.
RCA output jacks are used to send the output from the unit to an amplifier if you have one and cannot be used to power a speaker.

try pacparts.com.

get a hold of some deck keys remove trim plate they slide down the sides and unlock the deck taks all of 15 sec