1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 322Get this manual
Power Trim System Wiring Diagram BLK BLU GRN RED BLUWHT GRNWHT BLACK BLUE GREEN RED BLUEWHITE GREENWHITE Negative () Trim Motor (UP) Trim Motor (DOWN) Positive (+) Trim Switch to UP Relay Trim Switch to DOWN Relay