I have 99 f150 with the electric shift 4x4 but it does not work. When I turn the **** I can hear the relay but nothing happens. I have taken the transfer case motor of and manually put it in to 4x4 and everything worked. But I know it's not the motor cause I jumped 12volts to it and it runs prefect. I have checked all the fuses and they seemed fine. I'm suspecting a bad gem based off other fourms. Is there any way to verify this before I buy another one?

 

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