1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 386Get this manual
ELECTRIC SHIFT PROGRAM (ESP) Disconnect the control unit 5P connector
W ith the ignition switch NON"measure the voltage between the FledYellow connecto termina ofthe 're harness side and body gmulid,
Open circuit in RedIYellow wire Loose or poor contacts of related terminal
CONTROL UNIT 5P CONNECTOR
CONNECTIONRedlYe.IIow (+I -'Body groundD
STANOAR.O11 V
minimum
Normal Disconnectthe control unit 5P connector
Abl'1Ormal
Open circu it in Green ire
Loose or poor contacts of re l'at, terminal a