Radio, windows, trunk release and gas door release not working at times. Just do this intermittingly. Is their a loose connection or what? If so, where is the best place to start looking?

 

Sounds like you need to replace some of your fuses... in your case you can check the owners manual in the back there should be a fuse map telling what each one is for then you can check the fuse box, which is under the hood above the washer fluid reservoir. There should be some replacement fuses and a fuse grabber in your glove box mounted on the inside of its door... but if you bought your car used they may not be there anymore...
If it is loose wires then you may want to take off your door panels to check the power windows/ locks / speakers / seat adjusters. Taking the door panels off is easy... you will only need a Phillips head and flat head screwdriver for this...
[ol][*]First with a flat head screw driver pop off the two caps that are on each side of the door straps used to pull the door shut. Then with a Phillips head unscrew the two screws.[*]Then with your flat head pop out the plastic screw that is holding in the triangular pieces on top of the door panel (closest to the front panel). The whole triangular piece will not come off, just the screw will pop out.[*]Then, again with the flat head screw driver, pop out the little rectangular piece behind the inside door handle to open your door.[*]Once you have all of that done you simple lift the door from the bottom until the panel comes loose... now there will be a bunch of wires that you can check.... the first two closest to the top are the power locks you may want to disconnect them so you can rotate the door panel upside down to check the others.... Just remember to maneuver the door panel so it becomes free from the door handle as well...[/ol]
To put the panel back on just do the reverse but be surethat the plastic rod for the door locks, located behind the door panel, is placed back inside the lock otherwise your locks wont work.

Hope this helps, Good luck