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Radio

Discussion in 'International Forum' started by down south, Jun 30, 2018.

  1. Jun 30, 2018 #1
    down south

    down south Bobtail Member

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    Nov 4, 2016
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    i have 2007 9400I International key on engine not running popping static in Cb
    Voltage falls down to 12.5 on acceleration
    Noise gets louder but does with engine running and key switch off all grounds cleaned antennas changed as well as radio key switch off doesn’t make straight to battery
     
    down south, Jun 30, 2018
    down south, Jun 30, 2018
    #1
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  3. Jun 30, 2018 #2
    Heavyd

    Heavyd Road Train Member

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    Are you getting low voltage anywhere else in the cab under acceleration? CB is powered from fuse/breaker F5-B. Check your voltage there. The CB ground is at the cab stud in behind the dash on the right side. It would be in behind the breaker panel. Check for any corrosion. Also, check the basics, try a different radio and mic if you can.
     
    Heavyd, Jun 30, 2018
    Heavyd, Jun 30, 2018
    #2
    down south Thanks this.
  4. Jun 30, 2018 #3
    Lazer

    Lazer Road Train Member

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    You are picking up static from the electrical harness of the valve train. Typical IH
     
    Lazer, Jun 30, 2018
    Lazer, Jun 30, 2018
    #3
  5. Jul 1, 2018 #4
    down south

    down south Bobtail Member

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    Nov 4, 2016
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    I changed everything in battery box cleaned every ground outside the truck. I ran Cb to batter then changed ground to chassis the engine does not have to be running to hear popping static or noise what ever you want to call it. Just ignition switch in run mode doesn’t do it in acc mode heavy D has helped. Me a lot over the years gonna have find him buy him lunch anyway all help is appreciated
     
    down south, Jul 1, 2018
    down south, Jul 1, 2018
    #4
    Heavyd Thanks this.
  7. Jul 1, 2018 #5
    down south

    down south Bobtail Member

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    Also wouldn’t you have to run engine to pick up engine ststidc
     
    down south, Jul 1, 2018
    down south, Jul 1, 2018
    #5
  8. Jul 1, 2018 #6
    down south

    down south Bobtail Member

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    Nov 4, 2016
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    Static is what I meant
     
    down south, Jul 1, 2018
    down south, Jul 1, 2018
    #6
    Bean Jr. Thanks this.
  9. Jul 2, 2018 #7
    Heavyd

    Heavyd Road Train Member

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    Do you have fridge or power inverter, or any other electrical accessories running?
     
    Heavyd, Jul 2, 2018
    Heavyd, Jul 2, 2018
    #7
  10. Jul 2, 2018 #8
    down south

    down south Bobtail Member

    37
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    Nov 4, 2016
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    No engine off key off fine last night i cleaned all grounds again turn key on I call it popping static I have a power filter in line to I have a Wilson and new coax and a 102 whip trying different things
     
    down south, Jul 2, 2018
    down south, Jul 2, 2018
    #8
  11. Jul 3, 2018 #9
    Ridgeline

    Ridgeline Road Train Member

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    A few things.

    First the voltage dropping means an alternator issue, you need to check it by checking the voltage at the batteries while accelerating, it you see a drop there, then you will need to look at the power cable to the alternator and the ground at it. May have to replace it.

    Second is static. It is coming into the radio only two ways, the first is through the power line and the other through the antenna. When you put a filter on the power (and not all filters work by the way) and still there then it could be the antenna and a good indication of a ground problem with the antenna and coax. IT is a bit different than a power ground and there is something that is called a Common Mode Current issue that happens a lot with trucks.

    See this link for a good explanation - Common mode current
     
    Ridgeline, Jul 3, 2018
    Ridgeline, Jul 3, 2018
    #9
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