Thank U so much for this tip.
I already unlocked a RDS Delco Radio (this hasn’t MP3). I tried 2 times because the EEPROM was slight different and this was difficult to identify which was the pin 8…so when I lifted a wrong pin the radio was unlocked but without sound
and many options were not working
, so I soldered the pin again and tried with other pin and this time the radio was unlocked and 100% functional
(the memories, sound, and all functions are working as expected and no CAL ERROR is displayed in the screen).