If a cell phone was never installed in the car, there is nothing else that would keep the antenna mast extended, except a failure in the system. Chance are it's just a stuck mast, the mast is available seperately. Other possibilities would be a blown fuse or the antenna motor itself failed in some way. Never seen a radio itself cause a failure like this. There is no other control over the antenna, no seperate switch on the amp or radio. On the factory phone, as has been discussed, there was a seperate power switch on the phone (either handset or cradle) that needed to be switched off, otherwise the phone remained on and the antenna stayed extended. So if there is no phone handeset or cradle in the center console (or indash controller in that small center compartment above the center dash vents), then it has to be a failure in the system.
Gilly
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