I found a blown bulb (actually, it had shattered in the receptacle, ... it was the "spare" bulb for the rear fog lights) and removed and replaced it with a working spare. Rear fogs come on fine. However, now, the third brake light (in the rear window of a 850 sedan) does not come on. Looked in the manual and did not see a dedicated fuse for that light, and I replaced it wit numerous 1157 and 1156 bulbs but still no illumination. Checked the contacts as well (however I will be checking them again). Going to the junkyard today to see if there is an 850 that I can salvage the third light assembly part to replace and see if that will resolve the problem. However, if it does not resolve it, what other items should be checked?

Thanks.