Bombardier SeaDoo 1990 factory shop manual, Page 124Get this manual
Sub-section 5
ELECTRICAL (CDICHARGING SYSTEMS)
Section 07
Ignition Module Test
a) To perform this test, switch can be at LO or HI position b) Set the selector to CONTROL UNIT position
cDepress START switch for five seconds minimum and
read LED level indicator Reading should be from to 5
Ignition Module Diode Test