GENERAL
COMPONENT
TESTING
NOTE:
WESTERBEKE recommends that the following engine
testing adjustments be performed by a competent technician.
TAP
THE
GROUND
CONNECTION
TO
THE
TERMINAL.
RELAY
SHOULD
All
DC
voltage measurements are made
to
the engine battery
negative
ground point unless specified otherwise. In making
test measurements, make sure that a good ground for the
meter
is
established, preferably the point where the negative
battery
is
connected
to
the engine. Battery positive voltage
is
indicated
as
B+ and should measure
no
less
than
11.5
volts.
___
~
"CLICK"
ON.
AC
voltage measurements should
be
made with a true
RMS
AC
meter
to
insure measurement accuracy.
ENGINE.GROUND
GROUND
AND
B(+)
.
CONNECTIONS
RELAYS
The
relays used in the control system have coils which are
polarized
by
the
fact that they have internal free wheeling
suppression diodes across them. Relay coil terminal
86
must
be
maintained (+), terminal 85(-). The relay coil
is
rated
12V
DC,
and the coil resistance
is
typically
85
ohms. With B+
on
terminal
86,
direct grounding
of
terminal
85
is
permissible
for
testing purposes.
RELAYS
RELAY
TERMINALS
REMOVE
THIS
RELAY
CONNECTOR
Engines & Generators
48
TO
B(+)
TESTING
THE
RELAY
TERMINALS
TESTING
COIL
RESISTANCE
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