Electrical gremlins

My 1997 J-30 Infiniti has interesting symptoms. First, the radio would just stop, oftentimes related seemingly to braking, slowing, speeding up, but otherwise just happen. Then the remote stopped working. Now the car alarm goes off sometimes when I open the door.

These problems may be due to a loose power or ground lead connection. You may be able to flush out the culprit down by tapping on suspected areas with a screwdriver handle.

What do think “suspected areas” might be? Thanks.

Connections, relays, fuse contacts, anything that makes a connection in the power circuit.