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Originally Posted by ccfj1
I think that jochen is right, for some reason the the transmit circuit is not working
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Except he said it was RX not TX and I agree with him.
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Originally Posted by ccfj1
Does the GND connector have to be the one from the cd interface? (the cd 3 pin plug), I have it connected to the car body.
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No reason why it should be at all, the car body should be ok.
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Originally Posted by ccfj1
Also when I connect the circuit up to the laptop and add 12v and GND to the circuit the navcoder software seems to freeze untill I unplug the i-bus circuit, then its back to normal.
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Something is really wrong here, I would stop using it until you have checked over the circuit again, you could damage the car or PC.
Odia.