the passenger tail light doesn't light up when i tap the brakes, but when i hit the lock button on my key fob, that particular light lights up just fine. i have been working on stereo stuff, so i'm sure that working attributed to the non-working light, but i don't know how... does anyone have any clue how to fix such an issue? i really have no clue. a fuse maybe?

 

Its because the tail lights have 2 fillaments In the same bulb, 1 for the marker/tail lights and the other for the brake lights. So when you tap on the brakes and the light doesnt come on, its because that fillament in the bulb is out. When you hit the button on your FOB the tail light fillament works, meaning that one is good. SO ALL YOU NEED IS A NEW BULB.

 

I'll bet that your right side turn signal goes on but doesn't flash as well. Burned out bulbs will do that.