The other day I removed my tail lights to install some smittybuilt taillight guards. After I hooked everything back up I noticed my left taillight shines dimmer than my right. All of the bulbs are fine. Also yesterday when I went to hit my left blinker the green arrow on my dash stayed on and the left blinker didn't work. Is the one dim taillight problem maybe from a bad ground? I figured it's gotta be because the wiring harnesses haven't been touched since 1995... any tips?