1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 387Get this manual
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ELECTRIC SHI: PROGR.A (ESP), F Disconnect the oontrol unit 16P connectorWith the ignition switchOFF" measure the resistance between the BlackRed and BlueGreen co nnector te rmi.nal of the wire harness