1. Disconnect the negative battery terminal using a wrench to prevent any electrical accidents.
2. Locate the rear speaker grilles on the rear deck of the vehicle.
3. Pry off the speaker grilles using a flat-head screwdriver or a plastic pry tool. Be careful not to damage the surrounding trim.
4. Unscrew the screws holding the rear speakers in place using a Phillips-head screwdriver.
5. Disconnect any wires or harnesses connected to the rear speakers by pressing the release tabs on the connectors and pulling them apart.
6. Carefully remove the rear speakers from the vehicle.
Note: The steps may slightly differ depending on the exact trim level and options in your 1999 Honda Accord. It's always a good idea to consult your vehicle's specific repair manual for detailed instructions.