the brake light fuse is located where the brake pedal is at... just take the cover that it has above the brake pedal and you're gonna see fuses on your left....
Ebay
1985
On the brake pedal arm.
You did not specify what year the 300ZX is. If it's a 1985, the brake light fuse is in the fuse panel near the drivers left foot, third up from the bottom on the left side of the panel.(should be marked on the inside of the cover ) Hope that solves your problem, or the brake light switch behind the break pedal may need replacement.(inexpensive part, around $7.00 at Auto Zone/Advanced auto.
Inside the cab, underneath the instrument panel slightly left of the brake pedal.
yes
Check the brake light fuse. If you have 12 volts at the brake light switch I would suspect the signal light switch is at fault.
To the left of the brake pedal on the side kick panel (it is a curved lever and it is not marked)
The 1985 Buick Regal did not offer the 305 V8 as an option that year.
It is mounted on a bracket under the dash at the brake pedal. From there it is self explanatory.
With an ohmeter or a self-powered test light. Hook the two leads of your tester to the terminals on the brake light switch. Push down on the brake pedal and if the light stays off or the meter stays at infinity, the switch is bad.
Usually on the upper end of the brake pedal under dash area