my turn light is my arm

Continue following the white wire, B1-18W goes up through page 8-162 and off the left of the page..........and through page 8-161 from right to left........and then comes INTO page 8-160 at bottom right...........

Note that it goes up to a junction, through the bulkhead connector and to the BACKUP lamp switch, and branches off to the right and up (D1-18BK) and off the top left of the page