2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 474Get this manual
SIGNAL SYSTEM
C0NTINUITY
Remove the diode from the couplerConnect the pocket tester1) to the diode terminals as shownCheck the diode for continuity as followsNOTE: When you switch the tester's positive and negative probes, the readings in the left chart will be reversedContinuity INCORRECT
Tester (+) lead BlueBlack terminal Tester () lead WhiteBlue terminal Tester (+) lead WhiteBlue terminal Tester () lead BlueBlack terminal 1