I have a 85 GS with a power antenna, I saw in several threads a referance to a mod that will bring down the power antenna when one turns the ignition off, as you know it currently only goes down when the radio is turned off.

I did several searches & came up with zip.

jeff

 

is this under the assumption your still using the stock radio?

 

Mine goes down when I turn off the ignition. It doesn't have the stock radio anymore but that's how I bought it

 

stock radio, correct.
I have a digital multimeter, an analog one as well

 

The stock antenna won't go off unless you turn the radio off.