I might be wrong due to the information given to me years ago so a look see might be helpful.
When installing halogen bulbs you do NOT want to touch them with bare fingers because of the oil in/on your skin.
I was told this will cause them to overheat and burn out prematurely.
Not sure if it is what caused your problem so you may want to look into it.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping