Head lights and brake lights out not fuse

I pulled, it it has contanuity. I dont want to drive it without brake lights.

Did you ever find the problem with your lights ? My 89 B350 is doing the EXACT same thing yours was doing. EXACT same thing. Have found that when i push the brake pedal - Terminals B1 & B2 both lose power.

Solved Corrosion build up inside the bulkhead connector at firewall. Wire L1 (Red-White stripe) heavily compromised at the external terminal. You have to remove the exterior half of bulkhead from firewall - then roll up the rubber covering - to expose the external terminals to inspect. aka = long term water damage

Solved