Ford: REPLACEMENT OF BULB AND PLUGS, weather striping, cylinder dohc

Question
Ragu

Hi, can you please help me out, I have a 1998 Ford
explorer DOHC V-6 2 dr ford explorer.  I have two
questions -

First, how do I remove the rear lens so I can
change the stop light bulb.  I see 2 top screws
but something else is holding the lense


Question 2, When do I need to change the spark plugs in this 6 cylinder DOHC Engine

thanks

Ken

Answer
More then likely the weather striping is holding it in.use a small screw driver and pry little.
2.if the vehicle has more then 80,000 miles on it it is time to change the plugs.there good for 80 to 90,000 miles.also do a injector flush,throttle body d sluge,and replace the fuel filter.