1997 Johnson Evinrude "EU" 90, 105RW, 115, 150, 150W, 175 60 LV Service Manual, P/N 507268, Page 301Get this manual
WATER TEMP Circuit
1Separate the connector between the engine harness and the temperature switch[] 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 circuits5To test the temperature switch itself, refer to Temperature
Switch, Section 4
6Turn the key switch OFF and reconnect all circuits disconnected during these testsLOW OIL Circuit
1Remove the four screws retaining the pickup assembly to the oil tank
rn 2Turn thethe tank and holdONuprightAs lift float pickup key switch to positionthe assembly out of it the drops,