If the brake light is overridden by the blinker switch why do I have a front blinker right side and blinker on dashboard but nothing on the rear

SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...

There could be a fusible link under the hood off the starter relay that is burnt out.

SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...

I think I have found the problem. When I wiggle the ignition switch the turn signals and radio go on and off so I feel the issue is in the ignition switch. From what I understand the actual electronics for the switch are at the base of the sterring column behind the lower dash panel and is connected by a rod that may need adjusting.

SOURCE: 1997 GMC Sierra p/u. Brake light & blinker out. Lamp & fuse ok.

you probably got the wrong bulb
those are usualy a different number higher wattage, they look exactly like an 1127 but are a 2027 or even a 3027 check the bulb base it has the number printed on it

SOURCE: No brake lights or turn signals

Try changing your wires. from lights to blinker

SOURCE: NO LEFT SIDE TAIL ,STOP OR BLINKER REAR LEFTLIGHT

did you try to replace the bulb in the back normally when it blinks fast like that its just the bulb and its doulbe film thats why the brake and blinker dont work