Date: Fri, 2 Jan 2004 14:35:49 -0600 From: "Walt Kienzle" <wkienzlenopsam.net> Subject: Re: Electric antenna wiring & trouble shooting ...
My experience is not with anything as new as your model, but the ground connection is typically through the body of the car; therefore a separate wire isn't needed. As you have found, one wire supplies 12V all the time to allow the motor to move the antenna up and down. The second wire likely supplies 12V when the radio is on to signal that the antenna should go to the raised position. When the radio is off, there is no voltage present on that line, signaling the antenna to be lowered. BTW, my aftermarket Blaupunkt radio also follows this convention (as do all aftermarket radios that I have seen), so my power antenna still works correctly. I have seen replacement power antennas for about $30. Unless the problem is a bad fuse or broken wire, it may save much grief to just install a replacement instead of spending time trying to effect a repair. I hope this helps. Walt Kienzle 1991 9000T "Zon" <johnnopsamy.to.group.please> wrote in message news:1073074277.670134nopsam.vaisala.com... > I have some trouble with electric antenna, it does not work so to speak. I > opened it up, and noticed that there actually quite a few things that may > malfunction. What does typically break in electric antenna? I'm talking > about '99 9-3. > > I noticed there are two wires coming to antenna unit: one of them seems to > provide +12V regardless of ignition position, purpose of the another one is > unknown. Is it ground, or some kind of signaling? If latter one, how is > antenna grounded? > > These two wires seem to connect to black box in antenna unit, which has > three wires going to actual antenna motor module. What are these three > wires? I'm guessing they are +12V and two grounds, which are active > depending on the desired travelling direction. Is that right? What is the > purpose of this black module? It is approx. size of one cubic inch. > > How does antenna know/decide when to go up and when to go down? > > Please, help me out. I really would love to know how it is supposed to work > so that I could try to locate&fix it. > > BR, Zon > > >
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