TwinTurbo.NET: Nissan 300ZX forum - Not sure why it would do this but when the car is
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Subject Not sure why it would do this but when the car is
     
Posted by jzack on May 17, 2014 at 8:45 AM
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In Reply To Factory power antenna works BUT not while the car is running posted by 1T9T9Z1 on May 17, 2014 at 01:38 AM
     
Message running the car's voltage is higher than when off. About 11.6v DC off and 13.9v or so when the engine is running.

The only thing that comes to mind that's different about the car's conditions. Maybe the higher voltage causes the antenna motor to spin a bit faster and that binds the drive gear that lifts the antenna?

I'd take apart the antenna gear assembly apart, inspecting, cleaning an re-lubricating (when I replace a mast I've always done this - on more than one car).

Then test it before fully re-installing in the car. Might just require this fix or could be a whole replacement?

     
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