1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 198Get this manual
Troubleshooting the "Down Circuit"
Connect Voltmeter red lead to Point and black lead to groundDepress the "Down" trim buttonBattery Voltage Indicated: Connect Voltmeter red lead to Point 3I
Battery Voltage Indicated:
.Connect Voltmeter red lead to Point 2.Depress "Down" trim buttonNo Voltage Indicated:
No Voltage Indicated: Connect Voltmeter red lead to Point and black lead to groundDepress "Down" trim buttonIf battery voltage is indicated, wire is open between Points and 1
There is an open circuit between Point and positive (+) battery terminal.Check for loose or corroded connections Check wires for open