I have a 1990 Johnson 120HP and I need a schematic (not a wiring diagram)of the wiring for the tilt and trim circuits. The motor won't run unless I jumper the circuit in the relay box, then the motor runs fine - up and down. I suspect a missing or corroded ground wire connection but I don't know the color codes or where the connections are made. I have a wiring diagram but it's no help because the color codes can't be followed to their source or origin.
