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Old 02-22-2021, 11:31 PM
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Join Date: Jan 2015
Location: Quebec City, Canada
Posts: 92
190E antenna won't go up but motor works

I am at the point where I am about ready to start driving my 1992 190E after 2 years of storage/fixing. The antenna on the car always worked flawless. I replaced the mast back when I bought the car and never had a problem.

Now when I turn on the radio, the antenna won't come out. I removed the antenna from the car and opened the cover. If I turn the motor by hand, the antenna goes up. If I plug the antenna back in the car, it automatically resets by going down to the lowest position. Therefore, the motor does work. I have power to the red wire. I also have power to the blue wire. I don't know the voltages as I checked with a test light, but I can check back later. My guess would be that the head unit (aftermarket, but it worked before) doesn't send the signal to lift the antenna, but that is the blue wire and I have power to that wire! Anything else to check?

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Old 02-23-2021, 03:36 AM
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Join Date: Jul 2007
Location: Southern Oregon Valley
Posts: 1,599
Try pulling up the antenna by hand immediately after starting it electrically. If after giving it a running start and it continues upward on its own even if slowly, it's probably the bearing on the pinch roller that pushes against the mast at the wheel. Those little bearings tend to get gunked up and in turn need a good cleaning and re-lubrication.


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