Remove the ashtray and undo the screw behind it and then slide the ashtray/door release trim out.
In the bottom of the grab handle there is a small rubber bung, behind that is a screw, undo that.
On the outside edge of the doorcard there are 6 screws that need to be removed.
When you have removed all the screws pull the doorcard towards you and lift up gently, you now have to disconnect the electric connectors, one on the puddle light and one on the electric window switch.
The doorcard should now be free to remove completely.
You can now see the speaker which is held in with 3 screws, undo these and pull the speaker towards you and disconnect the plug.
The problem you have is more likely to be a loose connection in the wiring loom for the door where it comes out of the "B" pillar or a broken wire inside the rubber boot that takes the wiring loom from the "B" pillar to the door itself. have a play with the rubber boot and connectors first.
