I have a problem that I am experiancing after I completed installation of my lower wiring harness(alternator/starter) yesterday. Upon re-connecting the battery, the antenna mast extended without turning on the ignition or radio. I re-entered the radio code with the ignition on, turned off the radio, but the mast stays extended. The only way the antenna will retract, is to turn the key off. Before starting this project today, the antenna would only raise with the radio on. Any suggestions??? I want the antenna down when the radio is off, like it was before. Help.
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Gary
1992 500E
1995 Impala SS
2000 C5 Hardtop
2006 Hummer H3
G Man's Rides

Assuming you don't have a mast switch on the console, you can access the antenna motor behind the trim in the trunk and you will find a multi pin harness that plugs into it. You can pry the cover off of this connector and once exposed you can remove just the blue wire and test to see if there is voltage on that wire. (if you have a seperate blue wire use it instead of diving into the connector) If voltage (12V) is present then your raido is supplying the "raise mast" signal and is likely damaged by the power supply interrupt. If the wire doesn't have voltage then the antenna has shorted and is supplying it's own "raise mast" signal from it's full time power supply. The kicker is that if there has been an analog cell phone installed in the car (as was the vogue back in 92) it ties into the antenna as well so it gets real complicated there. If you determine that the radio doesn't give the raise mast signal at it's chassis connection when off but the antenna gets power on the blue line it may be the phone tie-in is causing your problem. Your best bet in that scenario is to remove as much of the phone hrness as possible and run a new "blue wire" from the radio back to the aerial.

Thanks for your help.

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Gary
1992 500E
1995 Impala SS
2000 C5 Hardtop
2006 Hummer H3
G Man's Rides