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I have a 1987 coupe and radio antenna stays up. motor keeps running
all the time and will not go down. Wondering if it a relay problem and
if it is where can I find relay. Any ideas would be appreciated.
1st time vet owner
The nylon mast rod is probably broken. When it breaks, the motor's limit switch's, cant be switched.
Pull the plastic trim at rear of cargo area and you will see the relay beside the hatch latch. Unplug the relay till you repair or replace the antenna.
I bought the repair kit from GM. It was about $20 and contains the nylon rod attached to the finial end of antenna.
To repair it, you need to remove the motor and mast tube. Pull the rear wheel and inner fender to get better access to it.
Here is a little info from my manual http://members.shaw.ca/agent86/Power%20Antenna.pdf
Good luck and welcome aboard