First thing I would do is get in the car, turn ignition to "RUN" position.
During "bulb test", ABS light should come on. If not, you either don't have
ABS, or there is a problem with the ABS light circuit.
If that is all good, check brake fluid level. If low, add fluid and check
Start there, then come back with more data. ;)
There is no "adjustment".
I was watching a TV show today on which a doctor was heard to say, "don't
come to my office with a self diagnosis, come to me with the symptoms and
I'll decide what the problem is." Treat your mechanic the same way.
Sounds like there is wiring problems or maybe switch mounting is loose. If
you say everything else is fine, pull the centre console out and check the
physical condition of the switch and wiring.
The brake warning light is a dual purpose light. In addition to identifying
that the emergency brake is applied, it ALSO signals a main brake system
failure of some type. Since you've ruled out the emergency brake, get the
car in the shop for a brake system diagnosis.
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