Tundra Regular Cab SR5 4WD V8-4.7L (2UZ-FE) (2000)
Control Assembly: Testing and Inspection
Component Inspection
Air Conditioning Control
1. INSPECT ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal B7 and negative (-) lead to terminal A8 then check that the illuminations lights up.
If operation is not as specified, check the faulty bulb.
2. 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.