I have read many posts and have not received a clear direction at all anywhere.
We have a 2003 T&C, 141K, wifes van.
About a week ago I noticed the drivers side brake light was inop.
OK, pick up some 3057's and replace...hmmmm.
I replaced the bulb yesterday and thought maybe I replaced the wrong one, because, ... not only does it not work, but the passenger side does not work either (it worked a week ago).
There are 3 bulbs stacked.
The lower one is running and turn signal/flasher light, they work fine.
The middle is also a running light, and I suspected the brake as well?? It is in-op.
The top was back-up.
All other lights working fine, even the CHMSL(center), which means there is brake signal getting to the rear.
Checked the bulb-to-socket connections, and they look tight & fine.
What next?? relay?? Circuit board?? Wiring?? Gremlins??