Suzuki Wagon R Manual page 1849

0A-16 GENERAL INFORMATION
Continuity check
1) Measure resistance between connector terminals at both
ends of the circuit being checked (between A-1 and C-1 in
the figure). If no continuity is indicated (infinity or over limit),
that means that the circuit is open between terminals A-1
and C-1.
2) Disconnect the connector included in the circuit (connector-B
in the figure) and measure resistance between terminals A-1
and B-1.
If no continuity is indicated, that means that the circuit is
open between terminals A-1 and B-1. If continuity is indi-
cated, there is an open circuit between terminals B-1 and C-
1 or an abnormality in connector-B.
Voltage check
If voltage is supplied to the circuit being checked, voltage check
can be used as circuit check.
1) With all connectors connected and voltage applied to the cir-
cuit being checked, measure voltage between each terminal
and body ground.
a) If measurements were taken as shown in the figure and
results were as listed below, it means that the circuit is open
between terminals B-1 and A-1.
Voltage between
C-1 and body ground: Approx. 5 V
B-1 and body ground: Approx. 5 V
A-1 and body ground: 0 V
b) Also, if measured values were as listed below, it means that
there is a resistance (abnormality) of such level that corre-
sponds to the voltage drop in the circuit between terminals
A-1 and B-1.
Voltage between
C-1 and body ground: Approx. 5 V
B-1 and body ground: Approx. 5 V
A-1 and body ground: Approx. 3 V