2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 217Get this manual
FUEL SYSTEM (Programmed Fuel Injection) Measure the resistance between the No1 injector 2P connector terminalsIs the resistance within 11.1 12.3(20!C 68!F)? YES NO GO TO STEP Faulty injectorINJECTOR 2P BLACK CONNECTOR
4Injector Input Voltage Inspection Fit the safety lanyard clip to the base of the engine stop switchMeasure the voltage between the wire harness side connector terminal of the No1 injector and groundConnection: Blackred (+) Ground () Is there battery voltage? YES NO Open circuit in the SIGNAL LINE wire Open circuit in the Blackred wireBlackred WIRE HARNESS SIDE INJECTOR CONNECTOR (viewed from the terminal side)