Brake lights...tail lights
 

Howdy all: Just a question. My 97 is the ONLY unit I have ever seen that when the brake lights(or turn signals) are illuminated only the upper lamps light! We all know that they have 2 dual filament bulbs each (and yes I have changed out the bulbs to check)
The sockets appear fine,lower tails function fine as well; just would like to know if anyone has a thought on this. I would prefer total lamp illumination upon braking & signaling!
Any input will be appreciated! Thanks!