1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 240Get this manual
Quality of the image is intentionally reduced!
Troubleshooting the "Down" and "Up" Circuits (All Circuits Inoperative) Remote Control NOT Equipped with Trailer Button Check two in-line fuses (under cowl) to see if fuses are blown
No Voltage