Question about Pioneer DEH-P840MP CD Player

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My deck DEH-P840MP will reset it self once in

My deck DEH-P840MP will reset it self once in a while. so I'll have to reset the radio stations and configure my settings again. any reason why that happens?

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Because u r a **** a lick to much cocl sorry buy new radio ******

Posted on Jul 14, 2009

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How can I get my car radio unstuck from one station?


Try disconnecting the negative ground (-) cable from the battery. That will disconnect power to everything including your radio. It might reset it self when you restore power by reconnect the negative ground cable to the battery.

May 19, 2014 | Pioneer Deh-4100 Single Din Cd Player...

1 Answer

Every time i turn off the the deh 2900 , stored radio stations are lost. how to store stations without losing them ?


this issue is caused by the deck not being hooked up to the constent from the cars battery take the deck out of the dash and get the color codes for the car and the deck and find the wire thats for the constant from the battery and hook up thoes wires

the wires are usually labeled on the deck as follows

labeled wires
red .......... ACC
yellow......+Battery
blue ........ system remote control/remote

unlabeled wires
green ...................................... speaker+
green with line ......................... speaker-
purple ..................................... speaker+
purple with line ........................ speaker-
gray ....................................... speaker+
gray with line .......................... speaker-
white ...................................... speaker+
white with line ......................... speaker-
black ..................................... Ground
orange ................................... dimmer+ (usually not used)
orange with line .......................dimmer- (usually not used)

i reccamend you to get the plug in harness that has the wireing alredy done you only have to match up the colors

i hope this helps


Aug 06, 2010 | Pioneer DEH-2900MPB, MOSFET 4x50W Max WMA,...

1 Answer

My pioneer deh-p840mp powers on and flips open, and seems to function fine with the exception of no sound going to all my door speakers and the bass to my subwoofers is a far sounding muffle even as I turn...


Un hook all your speakers that the deck is powering and hook them up one by one sounds like u have a shorted speaker or wire and the unit is going into protection.The best way to chk the speakers and wires is with an ohm meter . Check each speaker wire to ground and across the speaker and see iof you have any shorts. The next step woulk be to remove the unit and have it bench tested.

Jul 30, 2010 | Pioneer DEH-P840MP CD Player

1 Answer

DEH-P840MP CD Player: where can i get a wiring harness that connects my ...


Most automotive audio stores sell them. Also, Auto Zone sells installation kits.

May 16, 2010 | Pioneer DEH-P840MP CD Player

1 Answer

Pioneer DEH P4100


  1. well to set the clock you need to first hold the source button to turn it off to where the clock is just on. then press and hold the clock button until it beeps then use the arrows to set the clock..........
  2. and to set the stations you need to tune in your fav station and then press and hold the number you want to place that station. you can also do best station memory if you are in an unfamiliar area or if you just want to fast tune all the local stations that come in the best it will randomly preset the stations by pressing and holding till it beeps on the program bottom. then the screen will run BSM until it finds and places the stations. hope this helps!

Feb 16, 2009 | Pioneer DEH-P4100

1 Answer

Pioneer deh-p840mp weird concern


this is a problem that is caused by the ribbon cable that connects the two faces going bad - you can find repair kits for this unit on ebay.. just search DEH-P840MP and you will find "ribbon kits" or repair kits. They are usually about 15 dollars.

Jan 14, 2009 | Pioneer DEH-P840MP CD Player

1 Answer

Pioneer deh-p840mp


THERE IS A RIBBON CABLE THAT CONNECTS THE FACE PLATES TO THE RADIO THAT NEEDS TO BE REPLACED

May 13, 2008 | Pioneer DEH-P840MP CD Player

1 Answer

Lights blinking


CHECK THE GROUND CABLE

Apr 26, 2008 | Pioneer DEH-P840MP CD Player

1 Answer

Wire harness


You can purchase it from Pioneer Directly.

Here it is;

http://parts.pioneerelectronics.com/part.asp?productNum=CDE6563



Best of Luck.

Oct 31, 2007 | Pioneer DEH-P840MP CD Player

2 Answers

DEH-1900MP - lost functionallity after disconect/connect batery


Yes for some radio's if you take away power it has a theft lock and will not let you back in except if you have the code. To reset you must take power away from it. I would suggest if you don't want to take cd player out of car then disconnect battery. then when reconnect eject. May have to set for a moment.

Sep 21, 2007 | Pioneer DEH-1900MP CD Player

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