2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 269Get this manual
TRIM AND TILT ELECTRICAL CIRCUIT TESTS applied to the green lead, and negative (-) is applied to the blue lead
DRC6246A
Trim Sender Test
IMPORTANT: To avoid immediate meter damage, never apply an ohmmeter to an electrical circuit where voltage is presentDisconnect the 3-pin Deutsch connector between the instrument harness and engine trim harnessConnect an ohmmeter between the whitetan wire, terminal "C," of the engine harness and clean engine groundWith the outboard fully DOWN, meter must show reading above 80 ohmsWith the outboard fully UP, meter must show reading below 10 ohms If results agree, refer to Trim Gauge Test If results are different, replace trim sender