AM radio static when ignition is switched on.

Tiny
BELLAROSAARTIST
  • MEMBER
  • 2003 HONDA PILOT
  • 2.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
AM radio static
1. Turn on ignition prior to starting. Buzz in am radio signal.

2. Start engine. More buzz in am radio signal. Result: cannot use am input.

3 fm ok.
Monday, November 9th, 2015 AT 10:59 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,103 POSTS
A distinct buzzing noies which rises and falls with engine speed and is worse with AM reception is usually the result of either a bad radio ground or worn spark plug wires. Make sure the radio is properly grounded and check the antenna to make sure there is no corrosion causing a loss of ground. If all grounds seem good, question the engine's ignition system. Most likely the noise is from worn plug wires causing an electrostatic interference.
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Monday, November 9th, 2015 AT 5:49 PM

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