Although I'm not 100 percent sure myself, there's a cap that sits under the hood directly in front of the driver's seat... if you read the cap, it says on the bottom half "use only dot3 brake fluid yadda yadda yadda" + I do believe that's where you add the brake fluid.
diaphragm of 1991 Nissan sentra
no
You can find a picture or diagram of the 1991 Nissan rear brake drums at most Nissan dealerships. The picture or diagram can also be found in most Nissan service manuals.
Usually thru tube with narrow funnel (while running)
Your Nissan dealership can get one for you!
I think I had a similar problem with my 1991 Sentra. When the headlights were on, one of my wouldn't work. There turned out to be a loose connection with one of the wires.
The 1991 Nissan Sentra GXE has a gas tank capacity of 13.2 gallons, and takes regular unleaded fuel. The Sentra was first produced in 1982.
It rides piggy-back on the starter.
Super Multiple Junction
The fuel pump relay on a 1991 Nissan Sentra is in the gas tank. To get to it you have to remove the back seat in the car and you will see a compartment that is at the top of the gas tank.
grow a pair and get a life
It is a 13...