first thing u want to do is take out the two screws on each side of the meter and also take out all the screws on the bottom you will need a philips head screw driver

Now unscrew the 4 screws on the face plate and you will be able to lift the cover off the meter but be carful as there are a few plugs and screws left for you to remove

Unplug the three prong plug and unscrew and pull out all the wires off the terminal block now you are able to take the cover completely off> the terminal block is basically a neat way of distributing power

NOTE: mark where each wire goes on the terminal block for easy re installation

Unscrew all the nuts shown using an adjustable wrench to remove circuit board

tilt the bulb so screw access is available as shown then slide bulb canister off telescopic shaft

tools used : philips head screwdriver flat head screwdriver adjustable wrench