Interference on AM Radio on Weak Station from Electric Steering
imidazol97
Member Posts: 27,567
I hear a high pitched sound on a weak radio station that had been normal in reception until the last few months. It's there on some other more distant stations besides the 760 AM frequency that I listen to a lot.
It's an even tone at about 1500 Hz. It's gone if there's no tension on the steering, then it's there lightly with a slight tension turning the wheel, and it's a brushing sound with heavier torque on the steering wheel as the load on the steering motor increases.
Changing load on the alternator by turning on lots of high draw accessories does not change the sound.
Has anyone had this symptom?
It's an even tone at about 1500 Hz. It's gone if there's no tension on the steering, then it's there lightly with a slight tension turning the wheel, and it's a brushing sound with heavier torque on the steering wheel as the load on the steering motor increases.
Changing load on the alternator by turning on lots of high draw accessories does not change the sound.
Has anyone had this symptom?
2014 Malibu 2LT, 2015 Cruze 2LT,
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2014 Malibu 2LT, 2015 Cruze 2LT,
Dunno, seems like it was always the plug wiring that causes radio interference. Assuming your Cobalt even has plugs.
is turned on and the noise will occur then in relation to the amount of twist on the steering wheel.
When engine is running and steering wheel is turned invoking power assist but not rotating the
tires because the car is not moving, the whine is there AFTER the key is turned off and steering
held in tension requiring electric assist for a SECOND or so. But the whine dies as the power to
the assist from a capacitor dies out and the assist falls off and the steering wheel is dead during that
second after the key is turned to OFF.
Going down the street whine only occurs when steering is applying some effort to correct path.
Let go of steering wheel so car guides itself, and there's no whine.
This is on some stations that are not as strong, such as Detroit 760 which is 150 or so miles away.
I believe the steering motor was replaced long ago on the car. It now has 70K miles. Recent work
was done couple months back under bumper-to-bumper warranty for a metal on metal noise in
steering shaft as front wheels hit bumps. No looseness felt in steering, just a noise. I believe
dealer replaced "intermediate shaft." I don't have a work order because it was under the warranty.
2014 Malibu 2LT, 2015 Cruze 2LT,