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Power Antenna Wiring

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monarchd's picture
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The power antenna on my 1983 300CD has been replaced by a replacement Hirschmann antenna which has a plastic "plug in adaptor" for the 12 volt power source and signal from the radio. I would like to replace this antenna with an original Hirschmann antenna from a 1984 300D with the mounting bracket from the 300CD. My problem is the wiring - the colors of the wires do not match up with the wiring loom in the car. I have hooked up the wires according to the numbers on the loom, but no luck. I know that my replacement antenna works fine as I hooked it up to my 1985 300D and it worked fine.

Does anyone know the proper way to wire this antenna? I dno know that I have two hot wires from the loom (red and blue wires). Thanks.

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Johnson Chan's picture
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The wiring is different for a 1984-1985 300D vs. the other years. Is the one in your 84-85 a black plastic case? I beleive the one that is correct for your year, 1983, is one of those shiny aluminum cased ones.

If you look at the wiring diagrams, it specifically has a different section for 84-85, so yeah the wiring is a little different.

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Johnson Chan's picture
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The wiring to the antenna also controls the trunk dome light. If they spliced into an aftermarket antenna, there is a possibility the dome light doesnt work.

I beleive it is red with a yellow stripe.

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