When I plug in the RCA jacks on my AVH P4900DVD Pioneer it has very very loud feedback and engine noise.IT DOES IT EVEN WHEN THE UNIT IS NOT HOOKED TO POWER.JUST HAVE THE UNHOOKED UNIT SITTING THERE, PLUG IN RCA AND THERE IS NOISE.Every thing is new.It is not amp it is the P4900DVD.How can I fix this.Iwill take it apart, no warrenty. Thanx

You can't directly plug in the Aux cable. The mini-plug for the AVH-285 is on the back of the receiver but it handles both audio and video from a composite source. (Note: this position means that it isn't easily reached when from the passenger compartment.)

You do need the CD-RM10 composite A/V to mini-plug adapter. The mini-plug port is between the video output and the rear/subwoofer outputs on the receiver. See page 35 of the manual for the picture. If your Aux input device has a 3.5 mm audio out (headphone jack), you'll also need a 3.5 mm (F) to RCA (M/M) adapter.

Pioneer has the manual for the AVH-285BT on the product page: https://pioneer-mea.com/en/products/avh-285bt/ . Two current link to the manual is http://pioneer-mea.com/wp-content/uploads/2015/12/AVH-185DVD285BT.compressed.pdf and https://www.pioneer.com.au/wp-content/uploads/2016/10/AVH285BT-Instruction-Manual.pdf .

I hope this helps.

Cindy Wells

You will need to connect the pioneer unit to a switched ignition wire from the ignition switch. The 2006 GM factory radio only has a constant B+ (orange wire) and ground (black wire). The factory radio turns on when the Body Control Module (BCM) sends the radio a turn-on signal (on a data communication line) when the key is turned on. Your pioneer unit won't talk to the truck's BCM, and will need you to wire a switched B+ feed to it that turns on in the ignition accessory and run positions.

Hold the and boost at the same time and press reset with a pin once screen resets let go of 2 buttons, this is the service menu and I cannot get any farther

bad output

Here you go, hope this helps. Posted at 1:03pm est
http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/Source/AV-Receivers/AVH-P4900DVD?tab=D

You will need to click on owners manual about half way down page If my solution was helpful, please rate it accrodingly

go into the menu screen on the pioneer unit and go to setting if you have a loud function there turn it on.... if that doesn't activate the amp ...(did you hook up the blue wire from pioneer deck to amp and run it threw the car to the amp)..if no than your pioneer deck does not realize there is an amp present in system....... if yes scroll threw menu till you see audio look for Sub Woofer or Amp you may even have a button on pioneer deck marked SW go press it and turn amp to on this will provide signal from pioneer unit to amp if this doesn't work other thing could be you hooked RCA to AUX input (but if you have a SW for RCA plugs on back of unit make sure the RCA wires are in it) the loud or SW button should activate it (if there is only F and R for RCA plugs on back of unit use R hope this helps)

This model of Pioneer has a common problem with a couple of fuses that are inside the unit mounted on the main circuit board that will blow. These are surface mounted fuses, and must be replaced with the same type of fuse. They are very small and white colored and require some good soldering skills and the proper soldering equipment do this job properly.

I work at an authorized Pioneer service center and have seen this problem many times. These units are very difficult to open up and work on. It is very easy to damage the ribbon cable that connects the flip out monitor to the main circuit board if not done perfectly.

What you can do as a work around for a short time, until you can get it in for repair, is this shortcut. It will restore your audio, but should not be considered a permanent fix.

At the amplifier (since it is easier to get at than the RCA cords coming out of the back of the Pioneer) you need to connect a jumper wire from the RCA ground on the jack to the power ground on the amplifier. The outer metal part of the RCA jack is the ground, the metal pin in the middle is the positive.

Remember, this is only a short term temporary work around and is not a permanent repair. You just need to supply the RCA output ground with a good ground.

The repair of replacing the surface mounted fuses can cost anywhere from $100 to $160, depending on the service center rates. Just don't wait too long, or play the amplifier too loud in the meantime.

if you look on ebay you can buy a universal harness for most pioneers ... type in pioneer universal dvd harness..... they aren't too expensive either...

is there an override code I could put in instead of the toggle switch?