Honda 1986 GoldWing GL1200A Manual page 49

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Faulty Tachometer.
WIRING: Check tor continUIty and short
No
circuits between meter and spark unit
couplers as follows.
Continuity
Meter Coupler Spark Unit Coupler
Y:G
Bu/Y
Y:Bu Y/Bu
Continuity
COUPLER: Check for poor contact at
Abnormal
meter coupler.
Normal
Faulty 011 Temperature Gauge.
• Open or short circuit in wire
hamess.
• Poor contact at left fairing harness
coupler.
• Poor contact at meter coupler.
• FaUlty meter
POWER TO SENSOR: Disconnect
sensor wire from
011
temperature
sensor Measure voltage between
sensor wire and body ground with
ignition switch ON
o
Volts
SENSOR WIRE: Check for continuity
between Bu/W terminal of meter white
20P coupler and sensor wire terminal.
No
Continuity
About
5 Volts
METER: Ground sensor wire terminal;
turn Ignition switch ON. Check that
temperature rises by one segment every
1 5 seconds Also check that
temperature decreases by one
segment every 1 5 seconds by
separating the sensor terminal
from ground.
SENSOR WIRE:
Disconnect meter
white 20P coupler
Check for continuity
between sensor wire
terminal and body
ground.
Normal Abnormal
Continuity
• Short circuit in
engine sub
hamess, main
harness or
fairing sub
harness
Above 200
n
• Poor contact at
left fairing coupler
or sensor red 6P
coupler.
• Open circuit in
engine sensor
sub harness or
fairing sub
hamess.
No
Continuity
~
• Check meter coupler
for loose contact. If
coupler is OK, meter
is faulty.
SENSOR: Connect sensor wire to sensor.
and disconnect meter white 20P coupler.
Measure resistance between Bu/W terminal
of meter 20P whlte coupler (on harness
sidel and body ground. Resistance should
be above 200
n
when engine is cold
(below 40°C!104°F).
Below 200
n
• Check for poor contact between
sensor wire and sensor. If OK.
sensor is faulty.
Above NOTE:
200
n
Resistance will be less when engine
IS
hot.
• Recheck with a known
good meter.
(cont'd)
8·5