1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 199Get this manual
Troubleshooting the "Up" Circuit
Connect Voltmeter red lead to Point and black lead to groundDepress the "Up" trim buttonBattery Voltage Indicated: Connect Voltmeter red lead to Point 3I
Battery Voltage Indicated:
.Connect Voltmeter red lead to Point 6.Depress "Up" trim buttonNo Voltage Indicated:
No Voltage Indicated: Connect Voltmeter red lead to Point and black lead to groundDepress "Up" trim buttonIf battery voltage is indicated, wire is open between Points and 8
There is an open circuit between Point and positive (+) battery terminal.Check for loose or corroded connections Check wires for open