1984 Chevy Camaro

welcome, check for voltage at the brake switch. Orange wire is hot all the time. White wire goes hot when the switch is activated. The brake lites are wired through the turn signal switch, the brake and turn lite use the same bulb filament, just not at the same time. Did you check voltage and ground at the bulb socket?

where would the brake switch be? i have turning signals on the front and back, and all my running lights are working, just not the brakes.

The switch should be activated by the brake pedal arm. Follow the brake pedal arm, upward.

Now i am having some problems with my radiator, when i let it run for about 5 minutes, the radiator resivoir anti freeze boils over with alot of steam, its not the water pump, and its not the thermostat.
Need a little help diagnosing the problem.

I'd take the thermostat out, hook everything back up, just for testing. See if there is coolant flow through the radiator. It is a possibility you could have a cracked head or something?

i already tested the thermostat by boiling it, i just put in a new water pump, i drained and flushed the radiator, water flowed through well. i checked th fluid that come out of the radiator and there was no sign of oil in it and i checked the oil and there was no coolant in it.

You may have to check for combustion gases in the radiator? Other than that, I don't know?

Could the coolant temperature sensor being out make the car overheat?