1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 254Get this manual
WATER TEMP Circuit 1Separate the connector between the engine harness and the temperature switch []J
2Using jumper wire, connect the engine harness tan lead to clean engine ground3Turn the key switch to ON positionAfter the normal self-test sequence, the gauge WATER TEMP light should stay on If WATER TEMP light is not on, troubleshoot tan circuit for an open in the engine harness or the instrument harness4On engines, test both temperature switch tan circuits
5To test the temperature switch itself, refer to Temperature Switch, Section 46Turn the key switch OFF and reconnect all circuits disconnected during these testsLOW OIL Circuit 1Remove the pickup assembly from the oil tank
rn 2Turn the the tank and to ON the float to Lift the pickup key switch positionassembly out of move position At