1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 266Get this manual
3 Trim Sender Troubleshooting
DRC6247
To avoid immediate meter damage, never apply an ohmmeter to an electrical circuit where voltage is present
1Disconnect the 3-pin Deutsch connector between the instrument harness and engine trim harness[] 2Calibrate an ohmmeter on the appropriate scaleConnect the meter between the whitetan wire, terminal "C", of the engine harness and clean engine groundWith the engine fully DOWN, meter must show reading above 80 ohmsWith the engine fully UP, meter must show reading below 10 ohms If your results agree, refer to Trim Gauge Troubleshooting If your results are different, replace trim sender