2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 424Get this manual
ELECTRIC SHIFT PROGRAM (ESPFE model) Check for continuity between the switch side connector terminals with each switch pushedContinuity should exist between the color coded wires asColor Whitered Whiteblue Switch Position UPSHIFT pushed DOWNSHIFT pushed
UPSHIFT SWITCH
White yellow
DOWNSHIFT SWITCH
INPUT VOLTAGE
Remove the front fender (page 3-9)Remove the handlebar switch 10P green connector from the frame and disconnect itTurn the ignition switch to ONMeasure the input voltage between the Blackred wire terminal (+) of the harness side connector and ground (-)STANDARD: 4.75.3 V