Specifications
PROBLEM
ELECTRICAL
TROUBLESHOOTING
CHART
The
following test procedures will
require
the
use
of
a multimeter and
the
engine's wiring diagram
(in
this
manual).
Also refer
to
the
relay
testing
page.
WESTERBEKE
recommends
that these tests
be
peiformed by a
qualified technician.
CAUTION:
When
servicing or
replacing
DC
components,
turn off
the
20
amp
DC
circuit
breaker.
TESTING
INSPECTION/SOLUTION
(12
VDC
is
battery
+
voltage
measured
to
ground)
Engine
does
not
crank,.
.....
Test
for
B+
(12v)
at
the
circuit
breaker
to
the
PC
board
terminal
T4.
Check
for
bad
connections
at
the
engine
harness
connector
P1,
Pin
1,
the
#14
red
wire,
or
at
the
battery
+
on
the
starter.
Check
the
connections
at
the
PC
board
terminal
4
and
at
the
circuit
breaker
IIOK
...
Test
for
B+
(12v)
at
the
circuit
breaker
to
the
panel
fuse
end
and
to
the
PC
board
terminal
T1.
If
OK
...
Test
for
B+(12v)
from
the
fuse
end
to
the
PC
board
terminal
T2.
ItOK
...
Test
for
B+(12v)
at
the
crank
relay
K1
terminal
30.
IfOK
...
Test
for
B+
(12v)
at
the
starVstop
switch
terminals
2
and
10.
IIOK
...
Test
for
B+
(12v)
at
the
start
switch
terminal
1
when
the
switch
is
activated.
IIOK
...
Test
for
B+
(12v)
at
crank
relay
K1,
terminal
86.
If
OK
...
ItOK
...
Test
for
B+(12v)
at
crank
relay
K1
terminal
85.
Activate
the
start
switch
and
after
a
few
seconds
the
voltage
should
drop
below
.5
volts.
If
OK
...
Activate
the
start
switch,
after
4-5
seconds
B+(12v)
should
be
present
at
terminal
87
on
relay
K1.
If
OK
...
Look
for
a
bad
connection
from
the
circuit
breaker
to
the
fuse
or
at
the
PC
board
terminal
T1.
Replace
the
circuit
breaker.
Inspect
the
connections
at
the
fuse
or
PC
board
terminal
T2.
Replace
the
fuse.
Check
for
a
bad
connection
at
the
engine
harness
connector
P1,
pin
#3.
Check
the
DC
voltage
at
terminal
#30
at
the
K1,
K2,
K3
and
K4
relays.
Look
for
bad
connections
at
the
panel
connector
82,
pin
1,
white/black/red
wire
to
the
terminal
PC
board
or
at
the
starVstop
switch
terminals
2
and
10.
Replace
the
start
switch.
Check
bus
fuse
(8
amp).
Inspect
for
a
bad
connection
at
relay
K1
terminal
8
orange
wire
or
at
ECU
connector
J2,
Pin
#8
Look
for
a
bad
connection
at
relay
K1.
Activate
the
start
switch,
after
4-5
seconds
check
for
Look
for
a
bad
connection
at
crank
relay
K1,
B+(12v)
at
the
start
solenoid.
terminal
85
orange
wire
or
at
the
ECU
If
OK
...
connector
J2,
pin
#8.
Inspect
the
starter.
Check
the
connections
at
crank
relay
K1
terminal
87,
yellow/red
wire
or
at
the
start
solenoid.
Engines
&
Generators
38