[thstone]

Swap the ebrake bulb with another known working bulb to test the bulb itself (a few come on at start up so you'll which ones are candidates for the swap).

Bulb itself should not stop the top from operating.

There are online hacks for working around the ebrake switch so you can use the top without having to pull the handbrake. This would also allow you to use the top while waiting to replace the switch.