Just changed out the left "dim" bulb on my mom's '93 Accord. There's no need to take out the entire lamp, but I did find it useful to remove the battery and fluid reservoir behind it.

I had to simultaneously press the release tab on the power wire plug and push the plug off with a screwdriver--it was really jammed on there solidly.

The locking ring underneath is much easier. No need to "push and twist," just find the square portion on the bottom and use it to turn the ring counterclockwise until the hole matches up with the tabs on the bulb (again, be prepared to use some force). Then pull the old bulb out, and the rest is easy.

Hope this helps.