1996 Johnson Evinrude "ED" Electric Outboards Service Manual, P/N 507119, Page 36Get this manual
Speed ControlVariable Resistor TestP.W.MModels
INote To avoid damaging components or troubleshooting equipment, disconnect the battery cables before proceeding[] 1Remove heat shrink tubes from variable resistor terminals, or use pins that can pierce wire cover at variable resistor
rn 2Turnvariable control wheel to OFF positionfull clockwise speed resistor shaft endlooking at
3Set ohmmeter to high ohms scale
rn andConnectwire insulation of ORANGE wire and of BLACK 4ohmmeter to variable resistor terminals, or to pins pierce
wi're Ohmmeter should show about 9,00010,000 ohms, when connected to the controller5Turn variable resistor slowly counterclockwise through full speed range Ohmmeter must show continuously decreasing resistanceThere must be no jumps to high resistance6Turn variable resistor counterclockwise to full speed position Ohmmeter must show approximately zero resistance at full counterclockwise position