Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 219Get this manual
Troubleshooting the "Down" Circuit (When "Up" Circuit is OK) Remote Control Models With or Without Trailer Button
Connect Voltmeter red lead to Point and black lead to ground Depress the "Down" trim buttonBattery Voltage Indicated:
No Voltage Indicated:
Connect Voltmeter red lead to Point 9
Connect Voltmeter red lead to Point and black lead to ground DepressDown" trim button If battery voltage is indicated, wire is open between Points and 1
Battery Voltage Indicated:
No Voltage Indicated:
Connect Voltmeter red lead to Point
2 DepressDown" trim button
There isan open circuit between Point and positive (+) battery terminal Check for loose or corroded connections Check wires for openBattery Voltage Indicated: No Voltage Indicated: