Basic Diagnostics Procedure - Subaru Legacy 2002 Service Manual

Wiring System
3) Symbol "k—k" indicates that continuity exists
between two points or terminals. For example,
when a switch position is "3", continuity exists
among terminals 1, 3 and 6, as shown in table
below.
3. HOW TO DETERMINE AN OPEN
CIRCUIT
S903627G5103
1) Voltmeter Method:
An open circuit is determined by measuring the
voltage between respective
ground using a voltmeter, starting with the connec-
tor closest to the power supply. The power supply
must be turned ON so that current flows in the cir-
cuit. If voltage is not present between a particular
connector and ground, the circuit between that
connector and the previous connector is open.

BASIC DIAGNOSTICS PROCEDURE

B6M0749
connectors and
G6M0208
WI-4
2) Ohmmeter method:
Disconnect all connectors affected, and check con-
tinuity in the wiring between adjacent connectors.
When the ohmmeter indicates "infinite", the wiring
is open.
4. HOW TO DETERMINE A SHORT
CIRCUIT
S903627G5104
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
located farthest from the power supply. If the test
lamp goes out when a connector is disconnected,
the wiring between that connection and the next
connector (farther from the power supply) is
shorted.
G6M0209
G6M0210