Everyone's experience is different but the out-come is usually the same. As Flatlander pointed out."Inspect the contacts of the bulb holder and the contact points on the electrical traces of the light housing. You will probably see some black racing marks and could even see melted traces" After you do that a number of times perhaps you'll get tired like I did and order a new taillight assembly. It installs on the drivers side in about 30 minutes. The other side a little longer. Sometime getting rid of aggravation is worth the money.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….