2004 ford f 150 back up sensor radio mute

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dschave

Member - Posts: 3

Joined: August 28, 2008

Location: Kentucky, United States

Posted: August 28, 2008 at 7:36 PM / IP Logged

I've installed an aftermarket DVD/Nav unit and I want to use the radio mute, from the back up sensor while reversing, that was present with the factory system. Just need to know what factory wire triggers the mute. Any help is greatly appreciated.

i am an idiot

Platinum - Posts: 13,677

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: August 28, 2008 at 7:54 PM / IP Logged

If you turn the radio volume all the way down, do you hear the back up alarm? How many wires are there in the vehicle harness that have nothing connected to them?

dschave

Member - Posts: 3

Joined: August 28, 2008

Location: Kentucky, United States

Posted: August 28, 2008 at 8:27 PM / IP Logged

The back up alarm is there...comes from a differnt place. From factory, the radio is not muted, but the volume is drastically reduced if the back-up sensors start to go off.

I went back and looked at a few things, and it seems that I need a hot wire, that is cut off when the sensors start to chime.

i am an idiot

Platinum - Posts: 13,677

Joined: September 21, 2006

Location: Louisiana, United States

Posted: August 28, 2008 at 8:34 PM / IP Logged

i am an idiot wrote:

How many wires are there in the vehicle harness that have nothing connected to them?

dschave

Member - Posts: 3

Joined: August 28, 2008

Location: Kentucky, United States

Posted: August 28, 2008 at 9:01 PM / IP Logged

3 wires in the main radio wire harness. dark blue....doesnt change, RED / black...grounded, gets hot when put in reverse (thinking this is the one, but my radio works the other way), and a gray/blue....constant hot.

i am an idiot

Platinum - Posts: 13,677

Joined: September 21, 2006

Location: Louisiana, United States

Posted: August 28, 2008 at 9:08 PM / IP Logged

If you have a switch or an alarm or keyless entry that has a positive output that you wish to use to switch a device that requires a ground such as a horn, dome light, parking lights, head lights, hatch release, etc., wire a relay as shown below to convert the positive output (trigger) to a negative output. 2004 ford f 150 back up sensor radio mute -- posted image.

2004 ford f 150 back up sensor radio mute -- posted image.

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2004 ford f 150 back up sensor radio mute

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