I bought an 03 cavalier with a Pioneer head unit already installed a few months ago. When I open the driver's door the radio doesn't shut off anymore like it should. Sometimes I can push the door jamb in and release it then the radio will turn off, but other times I have to pull the fuse out. I pulled the kick panel out and can see the wires running to the jamb and door, but I'm not sure what to do from there. Any help will be greatly appreciated.

Thanks

 

Probably has the Chevrolet radio aftermarket interface that is going bad. Chevy did not have accessory power at the radio so when an aftermarket unit is installed, it requires an interface to provide an accessory power that it derives from the signals in the data stream. Many times, these interfaces go bad.

Since you have an older vehicle, I am sure you don't use Onstar (if it even has it), and I am sure it has no Bose system from the factory. So, you (or a competent shop) can just bypass the interface and run a switched accessory lead to the fuse box or body control module. You will lose the RAP (retained accessory power-supposed to leave the radio powered up even after you remove the key but only until you open the door), but most people don't care.

 

or his door pin is bad.

 

Thanks for help.
I was told to connect a wire to the ignition wiring, but I'm not sure what wire I am looking for. Not sure if that was the same thing you mentioned.

How would I check my pin?