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Q: Why doesn't the brake light on the dash go off? on 1997 Toyota T100

When I bought my truck it was one year old with 18,000 miles on it . When I started it the dash brake light was on I pushed on the emergency brake and it shut off. For the last 11 years it won't go off. It has passed inspection every year. This year it failed because the light is on all the time. The switch works as I took it out and tested it. It has continuity when the emergency brake is off. I had one light out in the cab brake light. I replaced all three and it works fine. The dash brake light is still on. They will not pass it until I get the brake light to go off. They say it has a definite problem somewhere in the braking system. I'm baffled. HELP !!! I need another answer. I'm sure it is the parking brake light. does the actual brake have a sensor or is the switch on the steering column the only sensor? Thanks
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I've found that my jiggling the emergency brake handle it will sometimes turn off for a brief time, therefore it must be a problem with the switch under the dash at the bracket.
My solution was to place a small piece of black electrical tape over the light on the dash. Problem SOLVED!
I've never failed emissions, and have over 200,000 miles on the truck and have had it over 8 years.
Here is a forum I found with people having the same problem
One person had low brake fluid the other had a bad emergency brake assembly
This article may help get you started down the right path:
check your body ground wire that goes from your negative terminal on your battery to your inner fender. I had the same problem with my light being on all the time. Checked the parking brake and the brake reservoir both ok. I hooked the ground back up and no more problems
if you have a manual transmission, there is an override switch on the dash under the tachometer that enables you to start the engine without depressing the clutch pedal. If this switch is engaged, it illuminates the brake light.
your air feed from the brake valve to the pk light switch is either parcially plugged, or the valve o-ring rolled inside the valve blocking the pressure required to trip the light circuit, or you have back feeding voltage to that park light circuit.
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