Mazda 323 1988 Workshop Manual page 196

RADIATOR SWITCH, ELECTRIC FAN RELAY
3B
RADIATOR SWITCH (FOR 4WD)
INSPECTION
1. Remove the radiator switch.
Warning
Do not disconnect the radiator switch connec-
tor while the ignition switch is ON because the
fan will turn.
Oil
2. Place the radiator switch in a container of engine
oil.
3. Connect a circuit tester to the radiator.
4. Check that continuity is not indicated when the oil
temperature is 105OC (221
OF),
and that continui-
ty is indicated when the temperature is 96OC
(205OF).
Warning
Do not heat the engine oil above 120°C
(248OF).
5. If the radiator switch is faulty, replace it.
Note
Clean the engine oil on the switch~ when the
switch is reused.
ELECTRIC FAN RELAY
INSPECTION
1, Disconnect the water therm0 switch connector, and
then check whether the fan turns when the igni-
tion switch is turned ON. If it does, the relay is func-
tioning properly.
2. If the fan doesn't turn on, check the continuity of
the fan relay.
(1) Check for continuity between (a) and (b) ter-
minals, (c) and (d) terminals.
(2) Cheek that there is no continuity between (a)
and (b) terminals when 12V battery is applied
across (c) and (d) terminals.
3. If the relay is faulty replace, if not, check the fuse
and wiring harness, and for poor contact or a loose
coupler.
38-7