Trim/tilt blows engine main fuse - Johnson 115hp Oceanrunner

[norwarchipelago]

Hi. The engine main fuse 20A blows when operating the trim/tilt switches on throttle/motor.
I have removed all wires to the pump, but the fuse still blows when pressing up or down.
I can't find any leak to ground from the relay box, and both relays are new. Anyhow, a bad relay shouldtent blow the fuse, should it?
Anyone who can give me help here?

F Smith

 

[Chris1956]

The wiring is likely shorted to ground somewhere in the engine harness, Look for melted wires on the engine harness.

If '96 and newer there are 2 connectors on port side of motor. Look there for melt, and then move to under dashboard wiring.

 

[dingbat]

If yours is like mine, neither switch, helm nor motor, is switching power.

The power comes directly off the starter solenoid, but you also have power feeding, thru a fuse, to the helm (via the engine harness) and trim switch on the motor.

I would start with the trim switch in the binnacle if you have one. I’ve had to replace mine twice