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Yamaha 90F 4-stroke blown 20 amp fuse

W

Wcatman

New member
2003 90F HP Yamaha has a 20 amp and a 30 amp fuse.
The 30 amp blew - found and fixed carroded connector on red wire from battery to turnoff switch.
Next trip 20 amp fuse blew. Any ideas on what it protects and where to start troubleshoot appreciated.
Thanks,
 
I couldn't find wiring schematic for 2003 F90. Below is the schematic for the 2004 F90. Should be the same. Looks like the 2 fuses protect the PTT motor and relay and starter motor and relay. If you don't have a service manual, now is a good time to get one. There are procedures detailed for meter testing each system.

F90.jpg

F90.1.jpg
 
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