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1.Let the engine run (2,000
r/min), and check the printed heater with the battery
fully charged. 2.With the rear window defogger
switch "ON," use the circuit tester to measure the voltage
of each printed heater at the rear window glass centre A
point. If approximately 6 V is indicated,
it is judged good. 3.If the voltage of 12 V is
indicated at the A point, there is an open circuit between
the A point and negative terminal. Therefore, by moving the
test bar slowly to the negative side,
search and determine the location where the voltage changes
suddenly (0 V). The location of
voltage change indicates the open circuit
position. 4.Also, if the voltage indicates 0 V at
the A point, there is an open circuit between
the A point and positive terminal. Therefore, search and
determine the location of voltage change
(12 V) using the above mentioned method. 5.If a
malfunction such as open circuit occurs, replace the
tailgate window glass (Refer
to GROUP 42A - Tailgate Window Glass ).
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