2008 Yamaha WaveRunner FX SHO / FX Cruiser SHO Service Manual, Page 342Get this manual
Indication system
E 3Measure: Multifunction meter input voltage Within specification Replace the multifunction meterOut of specification Check the wiring harnessMeasurement steps: 1Disconnect the multifunction meter coupler 12Push the unlock button, and then measure the input voltage at the multifunction meter coupler terminals (wiring harness end)Multifunction meter input voltage: Redyellow (RY) Black (B) 12 (battery voltage)