Toyota Camry Manual page 396

BODY ELECTRICAL SYSTEM
w/ POWER SEAT:
Continuity
(a) Check that there is continuity between terminals 1
and 2 on the switch side connector with the switch
ON (belt fastened). '
(b) Check that there is no continuity between terminals 1
and 2 on the switch side connector with the switch
OFF (belt unfastened).
If operation is not as specified, replace the seat belt
inner belt.
METER ILLUMINATION CONTROL
SYSTEM
INSPECT LIGHT CONTROL RHEOSTAT
(a) Connect terminals 1 and 3 through a 3.4 W test bulb.
(b) Connect the positive (+) lead from the battery to
terminal 1 and the negative (–) lead to terminal 2.
(c) Turn the rheostat knob to fully counterclockwise,
check that the test bulb goes out.
(d) Gradually turn the rheostat knob to clockwise, check
that the test bulb brightness changes from dark to
bright.
If operation is not as specified, replace the rheostat.
BULB CHECK RELAY INSPECTION
INSPECT BULB CHECK RELAY
(a) Connect the positive (+) lead from the battery to
terminal C through a 1.4 W test bulb and the negative
(–) lead to terminal B, check that the test bulb does
not light up.
(b) Connect the positive (+) lead from the battery to
terminal A , check that the test bulb light up.
If operation is not as specified, replace the relay.
– COMBINATION METER
BE–77