As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL350 RED CABIN ALT LIGHT ILLUMINATED. VERIFIED CABIN WAS AT 10000 FT, INITIATED EMER DESCENT. TROUBLESHOT ELECTRICAL AND FOUND AND CORRECTED WIRING AT PIN "A" OF CONNECTOR PC042 AND PC003 OPS CHECKS GOOD IAW MM 21-30-00 AND SB560XL-21-19 (AS REFERENCE) OPS CHECK GOOD.