Just unplug the power wire below the motor or the fuse in the fuse box..
It is under the hood at the right rear of the engine compartment at the antenae.
Disconnect wires at antenna
Check your RPO codes. If it has an U75 than it had a power antenna. If it has RPO code US6 it has a painted fixed antenna. There was only one style power antenna used from the factory.
remove the pass. finder linner and find plug to the motor and disconnect it
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Try finding the power cord that goes into the antenna and disconnect it
the antenna its self will have a connector you can unhook
There is a wire which connects the power to the antenna. The wire is located under the hood right near the back of the fender hump on the passengers side. If you look you will see where it goes down insdie the fender to the antenna power unit. Just unplag the connector and you are good to go. vbdenny
Thankfully mine just died in the up position. Replacing them is a bear. 1. Turn the steering wheel to the far left position. 2. Disconnect the negative cable from your battery. 3. Remove the right inner fender splash shield (4 plastic studs, 3 screws) 4. Remove Phillips head screw retaining the antenna to the fender 5. Disconnect antenna lead and motor wires 6. Remove the two bolts from the lower bracket 7. Carefully pull the antenna and wiring assembly doen through the wheel opening
*For easy access remove the right front tire. Remove the fender well (phillips screws) to gain access to the power antenna. Disconnect the antenna and the plug. *If the gears are stripped you can purchase a replacement antenna and nylon gear strip cheaply on eBay
First physical pull the antenna all the way up, clean the antenna very good with a degreaser, then lubricate it with a silicon spray. Open the trunk, unplug the power to the antenna, start your car with the radio turned on, stop the engine, plug the power source to antenna back in. Try it now, if you still have the same problem, either the relay is stuck and needs replacing or the antenna motor is shorted and needs to be replaced.
Remove the wiring harness from the bottom of your 1987 Buick Regal power antenna. Remove the power antenna retaining nuts. The power antenna will come off. Reverse the process to install the new power antenna.