I found this related post:
http://www.project1999.org/forums/sh...ht=disarm+trap

Mechanics of Sense Traps (Velious era):
Mash the hotkey, and your character will face the direction of the trap. Note: Currently working on P99.

Mechanics of Disarm Traps (Velious era):
Two types of traps: visible (e.g., swinging axe in Sol A) and invisible (e.g., dispell).
There is a hotkey, but it does nothing for visible traps. For visible traps you must left-click the device.

I am not certain of the mechanics of the Disarm Trap button/hotkey.

Invisible traps were in Dragon Necropolis, but I'm not sure where else. See http://www.angelfire.com/freak/eqjon...necropolis.htm
More info about Dragon Necro traps: http://everquest.allakhazam.com/db/z...32228297513969