1991 Plymouth Sundance brake light bulb replacement: Purchase the correct replacement brake light bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement brake light bulb information. Then consult your owner's manual for the replacement procedure. As simple as it sounds, the owner's manual is the best place to start for brake light bulb replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).
20 amp square 2 prong fuse
Remove the tire and wheel from your 1994 Plymouth Sundance. Remove the brake assembly spring. The brake pads will come off. Reverse the process to install the new brakes.
Auto supply store (I have have good luck with mid range)
Under the dash, driver seat side of the parking brake.
Master cylinder reservoir at driver's side firewall should have markings indicating full and low
see answer for the 1999 Breeze
Dodge shadow of the same year, same everything, body,engines, etc.
Often this type of behavior is caused by a bad ground for the lighting circuit. Check the ground circuit for the brake lights.
it sounds like to me that your master cylinder might be bad
Lift the car on a jack, remove the car tires, remove the brake shoe/calipers and remove the old brake pads. Properly dispose of the old pads, put in the new brake pads, replace the brake shoe/calipers, replace the tire and lower the car to the ground.
I believe it's a poor ground contact possibly within the switch itself. if your car is rusty look for external ground contacts and make sure that they are on clean shiney metal. If all looks good i'd replace the switch.
GET INTO THE TRUNK AND PULL DOWN THE CARPETING BY THE SIGNAL AND YOU WILL SEE THE BULBS JUST REMOVE AND REPLACE