Passenger side repeater not working

[finch wxm]

Passenger side repeater not working, replaced the side repeater as looks like water had corroded this over time so I replaced and soldered in a new one . Still no joy ! The copper looks black on the purple core when I stripped it . Any ideas what to try next ? All other indicators work fine

 

[finch wxm]

Anyone have a wiring diagram or know where the passenger side repeater cables go back too once back in the loom