Truck sitting in the garage (winter). Both tail lights and brake lights have been working. Truck has not moved since lights were last checked last week.
This morning, I was turning things on and off as part of checking them weekly during winter storage. I had no tail lights, but had brake lights. One hour later, when I revisited it, both tail lights and brake lights were not working. Truck has not be started, moved, etc between the two morning tests.
I have checked both bulbs (regular and brake) in both tailights and both are good. Just to make sure, I have even replaced them to no benefit.
I have tested voltage to the light socket buttons for both bulbs and there is no reading.
I have run a number wire from the negative battery post to directly ground the rear light fixture with no benefit.
Again, this truck has not moved since they were all working last week.
Thus my confusion!
