Tundra 2WD V6-3.4L (5VZ-FE) (2004)
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3. INSPECT BULB
Apply the tester as shown in the illustration to the test for continuity.
If continuity exists, replace the heater control.
If no continuity exists, replace the bulb.
4. Access cab, Standard cab: INSPECT A/C SWITCH CONTINUITY
If operation is not as specified, replace integration circuit bulb.