2001 Mercury Mariner 50-60HP Factory Service Manual, Page 141Get this manual
WIRING DIAGRAMS
Key Switch Test
1Disconnect remote control wiring harness and instrument panel connector2Set ohmmeter on scale for the following tests:
BLK PUR RED YEL== Black Purple Red Yellow
KEY POSITION OFF
CONTINUITY SHOULD BE INDICATED AT THE FOLLOWING POINTS: BLK BLKYEL RED YELRED PUR YELBLK