Yamaha FZR400 1988-1989 Service Manual page 302

CHECKING OF SWITCHES
NOTE:
Use thin probes for checking the continuity.
Otherwise, the probes may contact other ter--
*Check the continuity between "R" and "Br"
at the respective switch positions of "ON"
There must be continuity (the tester indicat--
ing "0") at the "ON" switch position, and
there must be no continuity (the tester indicat-
ing "oo'l) at "OFF", "LOCK", or "PI'. There
is something wrong between "R" and "Br"
if there is no continuity at the "'ON" position
or if there is some continuity either at the
"OFF" or "LOCK" or "P".
NOTE:
Check the switch for continuity several times.
tween "B and B/W", "L/W and L/R", and
"R and L/R" at the respective switch posi-
tions, as in the same manner mentioned
above.
6. If there is something wrong with any one of
the combinations, replace the switch com-
ponent.