Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 220Get this manual
Troubleshooting the "Up" Circuit (When "Down" Circuit is OK) Remote Control NOT Equipped with Trailer Button
Connect Voltmeter red lead to Point 10 and black lead to ground Depress theUp" trim buttonBattery Voltage Indicated: Connect Voltmeter red lead to Point 3No Voltage Indicated: There is an open circuit in wi res (bluewhitepurple-white, or purpl e) betweenUp" sol, noid and trim switche
Battery Voltage Indicated: Connect Voltmeter red lead to Point
No Voltage Indicated: Check for loose or corroded connection at Point or Point Check red lead between Point and Point for open