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MOST fibre cable light is blinking

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I am still trying to narrow down which unit on my fibre loop is broken (error message on my PCM).Took out my amp (because the dealer told me this was broken. I did notice some water under my co drivers seat. This made me suspicious. I have probably parked the car with a partially opened window and because everything was fine when I parked the car (for 2 week), I decided to check the phone unit. The unit moisty so I cleaned it. When I put my amp back in the car I saw a steady red light, but when I put my phone unit back, I noticed that the light turned off ones in a while (end of the loop).

I also heard the clicking sound around the PCM (relais?). Is the blinking light indicating something?

The clicking sound stopped as soon as the phone unit was back in the car.

The diagnose of the dealer does not make a lot of sense to me. Because everything was fine before and the fact that the phone unit was wet, makes me think that the phone unit is broken.

I do not want to spend x 100's $ , then to find out that the amp was fine (they will tell you that this was broken also). Is there a way to pinpoint the error (without a PIWIS or PST)?

Regards, frank

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