When the car warms up there is a terrible static noise?

2007 PONTIAC TORRENT
115,000 MILES • 2.6L • 6 CYL • AWD • AUTOMATIC
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JACKSON00099
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  • 1 POST
When the car warms up there is a terrible static noise. It only lasts a couple of seconds but is very loud. It is even there with the radio off and the heater turned off. Occasionally it will happen when the directional signals are on. This noise doesn't happen when the car is cold. The noise sounds like it is coming from the rear speakers. I hope you can help me with this.
Thanks
Jan 13, 2015 at 12:11 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check for a ground cable from battery to body loose or missing also from engine to body. should be one by battery lh side of vehicle
Jan 13, 2015 at 4:27 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
It can be an ignition coil shorting out or a broken spark plug. Also, there can be a diode that is out and it will allow AC voltage into the system, here is a guide to you find out.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please go over this guide and get back to us.
Dec 2, 2024 at 8:16 AM
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