OT --- Radio Static - AM Band, Engine OFF
 

I have static in my AM radio in the Bronco. When the key is set to ACC, the
radio works fine, but as soon as I set the key to ON (but not START), the
radio produces a loud hiss that drowns out the audio of the station I have
selected. the radio works pretty well in ACC, it can get a wide range of
stations, but when the key is set to ON, whichever station is dialed in at
the time is overcome with hissing or static.

What sorts of circuits in my Bronco can produce noise in the radio?

Remember, the noise is not coming from the ignition circuit because it
happens while the motor is not even running. In fact, the noise remains the
same after the motor starts, and does not change with engine speed.

The hissing does not sound like it comes from a motor (fuel pump), but I
suppose it could come from a circuit that has a motor (fuel delivery).

The power source for the radio is hot when the ignition is in ACC or ON, but
in ACC there is no noise. This means that another circuit that is hot in ON,
but not hot in ACC has to be the source of my trouble. It's times like this
when I wish I had a Factory Shop Manual.

Jerry B.?

Re: OT --- Radio Static - AM Band, Engine OFF
 

On Thu, 6 Jul 2006 09:15:17 -0700, "Jeff Strickland" <crwlr@yahoo.com>
wrote:

>I have static in my AM radio in the Bronco. When the key is set to ACC, the
>radio works fine, but as soon as I set the key to ON (but not START), the
>radio produces a loud hiss that drowns out the audio of the station I have
>selected. the radio works pretty well in ACC, it can get a wide range of
>stations, but when the key is set to ON, whichever station is dialed in at
>the time is overcome with hissing or static.
>
>What sorts of circuits in my Bronco can produce noise in the radio?
>
>Remember, the noise is not coming from the ignition circuit because it
>happens while the motor is not even running. In fact, the noise remains the
>same after the motor starts, and does not change with engine speed.
>
>The hissing does not sound like it comes from a motor (fuel pump), but I
>suppose it could come from a circuit that has a motor (fuel delivery).
>
>The power source for the radio is hot when the ignition is in ACC or ON, but
>in ACC there is no noise. This means that another circuit that is hot in ON,
>but not hot in ACC has to be the source of my trouble. It's times like this
>when I wish I had a Factory Shop Manual.
>
>Jerry B.?

My vote would be for the fuel pump. After that I would look to
whatever computers the Bronco has running. The fuel pump is the most
likely culprit.

The place to start is with your dealer. Most manufacturers have
service bulletins and fixes for radio frequency interference (RFI.) A
good place to get information is on the ARRL amateur radio site.
http://www.arrl.org/tis/info/rfiauto.html Although this is aimed
primarily at 2-way communications equipment, much of the information
would be applicable to the broadcast band.

----

Re: OT --- Radio Static - AM Band, Engine OFF
 

On Thu, 6 Jul 2006 09:15:17 -0700, "Jeff Strickland" <crwlr@yahoo.com>
wrote:

>I have static in my AM radio in the Bronco. When the key is set to ACC, the
>radio works fine, but as soon as I set the key to ON (but not START), the
>radio produces a loud hiss that drowns out the audio of the station I have
>selected. the radio works pretty well in ACC, it can get a wide range of
>stations, but when the key is set to ON, whichever station is dialed in at
>the time is overcome with hissing or static.
>
>What sorts of circuits in my Bronco can produce noise in the radio?
>
>Remember, the noise is not coming from the ignition circuit because it
>happens while the motor is not even running. In fact, the noise remains the
>same after the motor starts, and does not change with engine speed.
>
>The hissing does not sound like it comes from a motor (fuel pump), but I
>suppose it could come from a circuit that has a motor (fuel delivery).
>
>The power source for the radio is hot when the ignition is in ACC or ON, but
>in ACC there is no noise. This means that another circuit that is hot in ON,
>but not hot in ACC has to be the source of my trouble. It's times like this
>when I wish I had a Factory Shop Manual.
>
>Jerry B.?

My vote would be for the fuel pump. After that I would look to
whatever computers the Bronco has running. The fuel pump is the most
likely culprit.

The place to start is with your dealer. Most manufacturers have
service bulletins and fixes for radio frequency interference (RFI.) A
good place to get information is on the ARRL amateur radio site.
http://www.arrl.org/tis/info/rfiauto.html Although this is aimed
primarily at 2-way communications equipment, much of the information
would be applicable to the broadcast band.

----

Re: OT --- Radio Static - AM Band, Engine OFF
 

On Thu, 6 Jul 2006 09:15:17 -0700, "Jeff Strickland" <crwlr@yahoo.com>
wrote:

>I have static in my AM radio in the Bronco. When the key is set to ACC, the
>radio works fine, but as soon as I set the key to ON (but not START), the
>radio produces a loud hiss that drowns out the audio of the station I have
>selected. the radio works pretty well in ACC, it can get a wide range of
>stations, but when the key is set to ON, whichever station is dialed in at
>the time is overcome with hissing or static.
>
>What sorts of circuits in my Bronco can produce noise in the radio?
>
>Remember, the noise is not coming from the ignition circuit because it
>happens while the motor is not even running. In fact, the noise remains the
>same after the motor starts, and does not change with engine speed.
>
>The hissing does not sound like it comes from a motor (fuel pump), but I
>suppose it could come from a circuit that has a motor (fuel delivery).
>
>The power source for the radio is hot when the ignition is in ACC or ON, but
>in ACC there is no noise. This means that another circuit that is hot in ON,
>but not hot in ACC has to be the source of my trouble. It's times like this
>when I wish I had a Factory Shop Manual.
>
>Jerry B.?

My vote would be for the fuel pump. After that I would look to
whatever computers the Bronco has running. The fuel pump is the most
likely culprit.

The place to start is with your dealer. Most manufacturers have
service bulletins and fixes for radio frequency interference (RFI.) A
good place to get information is on the ARRL amateur radio site.
http://www.arrl.org/tis/info/rfiauto.html Although this is aimed
primarily at 2-way communications equipment, much of the information
would be applicable to the broadcast band.

----

Re: OT --- Radio Static - AM Band, Engine OFF
 

Start pulling fuses (one at a time) and see which one makes a difference
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: OT --- Radio Static - AM Band, Engine OFF
 

Start pulling fuses (one at a time) and see which one makes a difference
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: OT --- Radio Static - AM Band, Engine OFF
 

Start pulling fuses (one at a time) and see which one makes a difference
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Re: OT --- Radio Static - AM Band, Engine OFF
 

Fuel pump or fan

Jeff Strickland wrote:

> I have static in my AM radio in the Bronco. When the key is set to ACC,
> the radio works fine, but as soon as I set the key to ON (but not
> START), the radio produces a loud hiss that drowns out the audio of the
> station I have selected. the radio works pretty well in ACC, it can get
> a wide range of stations, but when the key is set to ON, whichever
> station is dialed in at the time is overcome with hissing or static.
>
> What sorts of circuits in my Bronco can produce noise in the radio?
>
> Remember, the noise is not coming from the ignition circuit because it
> happens while the motor is not even running. In fact, the noise remains
> the same after the motor starts, and does not change with engine speed.
>
> The hissing does not sound like it comes from a motor (fuel pump), but I
> suppose it could come from a circuit that has a motor (fuel delivery).
>
> The power source for the radio is hot when the ignition is in ACC or ON,
> but in ACC there is no noise. This means that another circuit that is
> hot in ON, but not hot in ACC has to be the source of my trouble. It's
> times like this when I wish I had a Factory Shop Manual.
>
> Jerry B.?
>
>
>
>

Re: OT --- Radio Static - AM Band, Engine OFF
 

Fuel pump or fan

Jeff Strickland wrote:

> I have static in my AM radio in the Bronco. When the key is set to ACC,
> the radio works fine, but as soon as I set the key to ON (but not
> START), the radio produces a loud hiss that drowns out the audio of the
> station I have selected. the radio works pretty well in ACC, it can get
> a wide range of stations, but when the key is set to ON, whichever
> station is dialed in at the time is overcome with hissing or static.
>
> What sorts of circuits in my Bronco can produce noise in the radio?
>
> Remember, the noise is not coming from the ignition circuit because it
> happens while the motor is not even running. In fact, the noise remains
> the same after the motor starts, and does not change with engine speed.
>
> The hissing does not sound like it comes from a motor (fuel pump), but I
> suppose it could come from a circuit that has a motor (fuel delivery).
>
> The power source for the radio is hot when the ignition is in ACC or ON,
> but in ACC there is no noise. This means that another circuit that is
> hot in ON, but not hot in ACC has to be the source of my trouble. It's
> times like this when I wish I had a Factory Shop Manual.
>
> Jerry B.?
>
>
>
>

Re: OT --- Radio Static - AM Band, Engine OFF
 

Fuel pump or fan

Jeff Strickland wrote:

> I have static in my AM radio in the Bronco. When the key is set to ACC,
> the radio works fine, but as soon as I set the key to ON (but not
> START), the radio produces a loud hiss that drowns out the audio of the
> station I have selected. the radio works pretty well in ACC, it can get
> a wide range of stations, but when the key is set to ON, whichever
> station is dialed in at the time is overcome with hissing or static.
>
> What sorts of circuits in my Bronco can produce noise in the radio?
>
> Remember, the noise is not coming from the ignition circuit because it
> happens while the motor is not even running. In fact, the noise remains
> the same after the motor starts, and does not change with engine speed.
>
> The hissing does not sound like it comes from a motor (fuel pump), but I
> suppose it could come from a circuit that has a motor (fuel delivery).
>
> The power source for the radio is hot when the ignition is in ACC or ON,
> but in ACC there is no noise. This means that another circuit that is
> hot in ON, but not hot in ACC has to be the source of my trouble. It's
> times like this when I wish I had a Factory Shop Manual.
>
> Jerry B.?
>
>
>
>