Need to know first if you have sealed beam headlights (those will have the single bulb with the dual filaments) or composite headlights (those will have two bulbs) in order to answer this question.
The only way your headlights can come on when you press on the brake pedal is a crossed wire. The brake light wire and the headlight wire can be frayed and touching each other.
Yes
Yes it will fit.
Being a Blazer it probably has the 4.3L V6.
Will a Chevy blazer engine fit in a Chevy s10 pickup
The 4.3L.
need diagram
The 1995 s10 blazer may have a damper. The damper will look like a shock connected to the steering assembly. You can look under the front end to see for sure.
Most major auto parts stores can get you a diagram of the ignition wiring for a 1995 S10 Blazer. You can also research the ignition wiring at your local library.
The 95 S10 4.3L still uses the distributor.
how to remove the door panel of a 1995 s10
32 inches