Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 191Get this manual
Electrical System Troubleshooting General Checks
Before troubleshoot ing the Power Trim electrical systemcheck the following1Check for disconnected wires
2Make certain all connections are tight and corrosior free3Check that plug-in connectors are fully engaged4Make certain battery is fully charged Refer to the preceding two wiring diagrams for connec tion points when troubleshooting the electrical system (Connection points are specified by number
Troubleshooting the "Trailer" Circuit (When "Up" Circuit is OK)