The radio should not be related but when you're talking about something non-factory that someone else did, it's impossible to know. Problems that act up so seldom are almost impossible to find until they get worse. I'd pull the radio out to inspect what's happening when you push on it.
When it acts up more often, a simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
With intermittent issues, it can be hard to track down. Plugs and plug wires are part of tune-up. Any applicable trouble codes? Check wiring also. Do you need a diagram?
Tuesday, October 30th, 2012 AT 6:56 PM