FixVault

Possible Causes

Possible Causes 
(B15) BRAKE SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND
(B16) BRAKE SWITCH NO. 2 SIGNAL CIRCUIT OPEN
(B16) BRAKE SWITCH NO. 2 SIGNAL CIRCUIT SHORTED TO GROUND
(Z904) GROUND CIRCUIT OPEN
STOP LAMP SWITCH
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  .