another possiblity is maybe its worn out from use. i have found quite a few high milage toyotas (pickups, 4runners, corollas, camrys) that the brake light stays on, but is slightly dimmer than if the E-brake is applied. im not sure if its sticky or if the circuit shorts slightly, but i know that my truck has the same problem. i have noticed that when i apply the brake, the light gets brighter, so im pretty sure mine is just from over use.

formerly 277000_yota
Old enough to know better, but still to damn arrogant to care...
]www.cardomain.com/ride/2614269
'90 'Yota 4X4 (10/31/05-09/10/08 R.I.P)
'98 'Yota t-100. 3.4, 5 sp. 4x4, 2 in. Toytec with BFG A/T 265/70R16s