There's power to the brake switch. The brake lights worked briefly until I repaired the right rear turn signal. I had to run a new wire to that turn signal. Don't know if there is a correlation. All the other lights work but the brake lights. There's a wire harness underneath the hood that feeds wires to the rear of the truck. None of those wires are hot when the ignition switch is off. The brake lights should work with the ignition switch in the off position. I should mention that I did put in all new bulbs exactly like the ones I removed. This is extremely frustrating and puzzling. What do you need to know to help me? What sort of test do I need to run? How can I pinpoint the problem?