Cw, may try spraying (with wd-40)/replacing the plunger switch on the e-brake arm above the pedal. If not that, problem may lie with the sensor (and/or it's wiring) in the master cylinder reservoir. Iirc, the sensor is not replaceable and you would need to replace the reservoir. Is your amber abs light illuminating, or the red brake light? If the abs light is not coming on, you needn't concern yourself with the abs module. You are aware that both the red brake light and amber abs light (if equipped) will illuminate briefly prior starting the car with the ignition key in the "on" ("run") position. Are all 3 rear brake lights working when you tap the pedal?