Mark: you replaced the relay *with* success since it has everything to do with indicating and not a lot to do with the flash option for lock unlock. That option might be in the FSM workshop manual along with the option to have the horn beep during lock unlock. Perhaps the keyless entry/security section?
Or maybe I’m wrong, mistaken, ill informed?
Here’s a post on the indicator relay being related to flashing indicators on lock unlock, but in the context of led indicators:
viewtopic.php?f=12&t=13271So maybe try a led indicator specific relay?
Iirc a guy in Sydney, Kane, makes these with all the fancy blinking hazard options.