Remove the center cluster module control with connectors still connected.
(a) Turn the ignition switch ON.
(b) Turn the light control switch OFF.
(c) Turn the rear defogger switch OFF.
(d) Measure voltage between terminal IDH of A/C amplifier. OK:
Voltage: Below 1.0 V
Proceed to next circuit inspection shown on problem symptoms table (See page DI-886).
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