Quote:
Originally Posted by mrz85
hello, sorry for my english.
i have e53 2003 with 16:9 navi, mb54 radio module in the trunk.
I installed Erisin ES3493B unit.
https://www.erisin.com/bmw-e39-e53-c...tion_p963.html
everything works perfect except the FM radio. very bad radio reception.
I changed 2 antenna amplifiers, one in the back side window
another in the rear window. nothing changed. when I connect another antenna, everything is ok.
i think that my oem FM amplifier is not activating, but +12 is coming to the amplifier. there is 1 socket on amplifier (3rd frome the left). but 2 wires are going into it. 1 is blue (ANT amp), 2nd the ibus wire.
9 and 13 pins
i have tried many antenna boosters with +12 wire connected to the blue wire (amp remonte)
still nothing.
i even tried to connect the unit directly in the trunk, without main cable and antenna extension.
I'm waiting for another adapter. but I think it does not help.
Who else has the same problem?
Thanks
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All of the early models of the aftermarket radios had pretty bad reception fm wise. That was one of the things I was impressed with on the Seicane I went with since it has great radio reception.
The built in fm amplifier does go bad but I doubt it would just from you changing radios. So if it was working ok when you did the swap then I imagine its the radio itself. The built in fm radio antenna is designed to work with the factory radio and doesn't have a very good reputation for working with anything aftermarket from my experience. Again that's why I was impressed and surprised the Seicane worked so well with it.
If the amplifier has power I cant think of anything else to try other than swapping the fm amplifier out but again that seems like a longshot if it worked good before the swap.