Subaru XT 1988 Service Manual page 1372

6-3 WIRING DIAGRAM AND TROUBLESHOOTING
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FAULTY POWER CONTROLLER CONTROL
Turn ignition switch OFF.
No
-I
Repair connections or harness.
I
Check if continuity exists between terminal
W of power controller body harness
connector and terminal W of signal con·
troller body harness connector
@.
Yes
No
: Replace power controller.
I
Check if 0.5 volts are produced between
terminals Wand B of power controller body
harness connector.
Yes
Replace signal controller.
§]
FAULTY SIGNAL CONTROLLER LINE VOLTAGE
Turn ignition switch OF F.
No
: Faulty battery or charging circuit.
I
Check if battery voltage is greater than
10 volts.
Yes
Replace signal controller.
I
100