Thanks. A search on the relay on a couple Corolla boards produced no hits. What Corolla board seems best?
I've put in a parts search on a Japan board (may just hear back that the part's obsolete).
There's only one transistor in the Retainer Relay that's unique to the taillight function so I've ordered some of that one (C2235Y) and will see what replacing that does. Fingers crossed.
Looking for two small black interior parts. The first is the cover for the rear inboard seat track bolt. The second is the bolt cover for the seatbelt shoulder strap where it bolts to the B pillar. Like to have two of each.