I have a 1989 Johnson 120 that the tilt and trim switch on the control box handle works, but I can't get the one on the side of the motor, the one at the back of the boat and the one at the front of the bow to work. Any ideas or wiring diagrams you recommend?
I would bet your bow trim switch is bad. On your motor you have a harness for you trim. It is a 5 pin plug near your bid red plug. That goes to the boat the motor plug is by itself,, unhook the trim harness and try the motor trim again. It should work,
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