Brake Light On, Anyone able to decipher? Options

[antonioguy]

My brake light in the car is now staying on constantly. It started flashing as it got colder here in CNY. I don't know if something to do with the cold is triggering it. But the brakes work fine, the fluid level is acceptable, but the light is on 90% of the time now.

Its a '95 7a. Lovely since its a '95 I cant just jack in with my OBDII and figure out the code. Any insight?

[Galcobar]

The brake fluid level switch can also become faulty. It's a simple float mechanism which breaks continuity when the float is raised. You might want to check that it's working correctly. The procedure is simple enough: disconnect the switch's wiring connector, and use a continuity tester on a multimeter to check that the switch has continuity when the float is down, and no continuity when the float is up. If raising the float does not break continuity, replace the switch assembly.

A similar procedure exists for the parking brake switch. Pushing the pin in should break continuity.

Those should be the only reasons your instrument cluster's brake warning light illuminates if the braking system is in good order. The exterior brake lights depend upon the switch under the brake pedal.

A third, but unlikely possibility, is that the instrument cluster or the wiring harness is damaged. It's unlikely to be the cause as the fault would need to create continuity, which would require two insulated points to somehow be connected.