Question about Pioneer DEH-P3900MP CD Player

1 Answer

After market radio connected to a 2003 Chevy Trailblazer

My after market radio is connected with the wire hardness for GM, but it is not connect so that it turns of with the car's ignition switch. The radios (red) wire is connected directly to the battery which cause the radio to be constantly on. How can I fix this so that it shuts off along with the igniton switch?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers


The recommended wiring is that the yellow wire (from the Pioneer DEH-P3900MP) be connected to an "Always ON" B+12 such as the battery's positive terminal. Additionally, the red wire should be connected to a switched/accessory +12 such as the ACC terminal of the ignition switch. Wiring it this way would switch off the radio when key is likewise off.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 27, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Chevy Radio Help (DUAL Radio)

You need to connect the red wire to a switched power source. The radio will not work of there is no power going to both the red and yellow wires. Yellow should be going to a constant power source (a source that is still hot when the key is off) as it controls the memory for the clock and preset stations. The red wire should go to a source that turns of when the key is off (accessory or ignition).

Apr 23, 2012 | Car Audio & Video

1 Answer

Which wire is the hot wire for stereo installation

Hello my name is Israel and I would be glad to help you. ON the after market radio you will need to connect the yellow wire to a battery (+12 volt) source. Your best option will be to connect that yellow wire to the fuse block on the connector labeled as "bat". Good Luck and please rate.

May 27, 2010 | Sony Car Audio & Video

1 Answer

How to install an aftermarket radio in a 2004 Chevy C2500

You will need a wiring harness for the model truck you have, plus a filler kit. The filler kit is what the radio will actually attach to and fill the space left by the factory radio. Follow the diagrams for wiring from the harness and the aftermarket radio. Generally, there are 8 wires to be connected for a four speaker system. In addition, you will connect a ground wire (black), a yellow wire (constant power), a red wire (this is to turn the radio on and off with the ignition), and a solid orange wire (illumination). Because you have a GM product you will also need an antenna adapter. All these things can be purchased at Best Buy, or WalMart.

Apr 22, 2010 | Kenwood Car Audio & Video

1 Answer

I've got all the wires connected, like the manual says, turn on my car and nothing happens, what gives?

first of all what vehicle is it, because if it is a 2003 gm or later you might have to run a separate power wire to your red wire on your stereo. but if it isn't a gm. disconnect the wire harness from the back of the radio and make sure you have a constant 12volt to the yellow wire and 12volts on the red wire when you switch the ignition key to on. use a test light or a multimeter for this. you can find either pretty cheap at wally world or an auto-parts store.

Apr 07, 2010 | Pioneer DEH-1100 CD Player

1 Answer

What do i need to install after market cd player in my 2004 GMC Sierra?

The sad part about installing into alot of GM cars is that the Harness is about $100 bucks

You need a Metra GMOS-01

You need a metra 40-GM30 ( Antenna adapter, since the stock plug wont plug into after market radio)

And a Metra 99-2003 ( dash kit

Apr 06, 2010 | Pioneer DEH-P2900MP CD Receiver...

1 Answer

My 2003 chevrolet trailblazer came with a stereo but my back speakers only play rarely...are there any schematics on the wiring of this so i will know where to start troubleshooting for the problem

sounds like you have a problem with the radio not your speakers and as far as schematics you may need to have somone check your radio out check the harness make sure its pluged in and secure make sure your connections are secure comming out of the harness your rear channel wires are green and purple so hope that helps

Mar 03, 2010 | Car Audio & Video

1 Answer

My 1986 chevy had an after market stereo and no plug, just naked wires. Re: 1986 chevy-kenwood kdc-mp242

on the 1986 chevy coming out the ignitiion wire is grey the battery wire is yellow and the ground is black. On the radio the ignition wire is red the battery is yellow and the ground is black. I found the info on the truck in an old repair manual and the info for the radio in the paperwork that came with it. Anyway once you hook these three then you can test to see which speaker wires go to whick speakers. Take any two sp. wires from the truck and hook them up to any speaker wires on th radio and see whick speakers play. For me, I looked behind my seat and the wires were showing. yellow + and yellow/brown -RL. Light blue+ and dark blue - RR.

Oct 12, 2009 | Kenwood KDC-MP242

2 Answers

Radio works untill i start the engine

You need to double check the wiring. It sounds like you have the system wired incorrectly.

Sep 01, 2009 | Pioneer DEH-P2900MP CD Receiver...

Not finding what you are looking for?
Pioneer DEH-P3900MP CD Player Logo

195 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pioneer Car Audio & Video Experts

Michael Kovalik III
Michael Kovalik III

Level 2 Expert

117 Answers

The Knight
The Knight

Level 3 Expert

71037 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Pioneer Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides