Subaru Impreza 2002 Service Manual page 3744

4. HOW TO DETERMINE A SHORT CIR-
CUIT
1) Test lamp method:
Connect a test lamp (rated at approximately 3
watts) in place of the blown fuse and allow current
to flow through the circuit. Disconnect one connec-
tor at a time from the circuit, starting with the one lo-
cated farthest from power supply. If the test lamp
goes out when a connector is disconnected, the
wiring between that connection and next connector
(farther from the power supply) is shorted.
2) Ohmmeter method:
Disconnect all affected connectors, and check the
continuity between each connector and ground.
When the ohmmeter indicates continuity between a
particular connector and ground, that the connector
is shorted.
BASIC DIAGNOSTICS PROCEDURE
G6M0210
G6M0211
WI-5
WIRING SYSTEM