OK, calm down LOL
Get yourself a factory service manual. FACTORY Not Haynes, and not Chilton. You can buy reprints or "on CD" various places
The newest online free one you can download is 73, from MyMopar. THERE ARE differences, though, between 73 and 74, one being the seat belt interlock system
MyMopar - Mopar Forums & Information - MyMopar Tools/Reference
MyMopar - Mopar Forums & Information - Service Manuals
Also from MyMopar, are NON factory wiring diagrams, which are not always correct or complete, but sometimes easier to follow and can be quite useful
MyMopar - Mopar Forums & Information - Mopar Wiring Diagrams 1972 to 1976
EXPLAIN what you mean "one brake light is stuck on all of the time?"
All of the time WHEN? With the car just sitting, shut down? This will run the battery down. That could be a stuck brake light switch added to "other problems" or it could be a wiring short.
You need to figure out what works and when...........
You have two FLASHER units, they are not "blinkers." One FLASHER operates the turn signals, the other one operates the HAZARD flashers, some times called "4 way" or emergency
Sometimes you can switch the two around, if one is bad, it might work as the hazard one sees little use.
Don't just "look" at fuses, check VOLTAGE. Use a 12V test lamp minimum, or a meter. Check for voltage at the fuse clips on both ends. Keep in mind, that a few of them are "hot" with the key off, the others must have the key in "run" or "accessory."
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A few "things."
Pull ALL of your brake / signal lamps and check them, clean the sockets, check the lamps are correct numbers AND THAT THEY WORK. Lamps can have, EG, the filaments can "weld across" making the turn and park circuits interconnect which can be fun. A wrong lamp can cause "fun"
Next, check with your lamp/ meter on both sides of the brake light switch. One terminal should be hot at all times. The other should be hot when you press the brake
THE BRAKE POWER goes from the switch TO the TURN SIGNAL SWITCH. The switch then routes the power to the two rear lamps. If both turn signals work but only one brake, or none, you might have a bad turn switch
WIGGLE TEST the hazard switch on the column. Those give trouble. Turn sig switches can "break apart" internally causing "fun."